{"product_id":"radiomaster-er12-pwm-dual-band-gemini-and-gemini-x-receiver","title":"Radiomaster ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver","description":"\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: start;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img28\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_1_6dd7e4cc-ee9f-42a8-9cf4-100d56495b9d.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\n\n\u003ch2 style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); display: block; margin: 60px 0px 25px; font-family: Arimo, sans-serif; font-weight: 700; letter-spacing: 0.6375px; line-height: 1; font-size: 25.5px; color: rgb(28, 29, 29); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003eFeatures\u003c\/h2\u003e\n\n\u003cul style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px 30px; padding: 0px; text-rendering: optimizelegibility; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eExpressLRS Performance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLow latency, high reliability, and excellent link quality with flexible configuration options.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eDual-Band Gemini-X RF System (2.4GHz + Sub-G 900MHz):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtilizes both frequency bands to provide enhanced link reliability across a wide range of operating environments.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003e12 PWM Outputs + Serial Support:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFull 12-channel PWM output with dedicated bidirectional UART and serial interfaces for system integration and expansion.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eXT30 Dedicated Power Input:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProvides stable, high-current power delivery for demanding servo systems and larger aircraft installations.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003ePWM Signal Amplification:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAmplified PWM outputs help maintain signal quality over long servo leads and extension cables. They also improve compatibility with larger, high-torque servos, helping ensure reliable control signal delivery throughout the aircraft.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eIndependent Multi-Source Voltage Telemetry:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMonitor up to three power sources simultaneously using dedicated ADC channels: EXT-V (up to 70V), receiver supply voltage (V-PWM) (up to 12V), and XT30 input voltage (up to 12V).\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eExternal UART Port:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDedicated interface for telemetry, external devices, and system expansion.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eWi-Fi Updates \u0026amp; WebUI:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eConfigure settings and perform firmware updates wirelessly without disassembly.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eRobust MMCX Antenna Connectors:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSecure, serviceable antenna connections for easy maintenance and long-term reliability.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eDurable Injection-Molded Housing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProvides consistent protection and structural durability for demanding installations.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eApplication:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned as a PWM receiver for large fixed-wing aircraft, especially where multiple servos and higher current loads are involved.\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\n\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eCompatibility:\u003c\/strong\u003e\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eCompatible with all ExpressLRS transmitters and modules, including radios with built-in ELRS.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003eBuilt on the ExpressLRS platform and equipped with dual Semtech LR1121 transceivers, the ER12 utilizes a dual-band Gemini X RF architecture operating on both 2.4 GHz and Sub-G 900 MHz. The result is a stable, consistent control link across a wide range of operating environments, with an architecture that prioritizes dependable operation.\u003c\/p\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: start;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img29\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_2_8bac902b-0a01-4748-b229-f4737c522606.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img30\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_3.jpg?v=1789007545\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img31\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_4.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003eThe ER12 uses amplified PWM outputs to help maintain reliable servo signals over long leads and extension cables commonly used in larger aircraft. The amplified outputs also help ensure clean and consistent signals when operating larger, high-torque servos that place greater demands on the control system. The receiver also features three independent voltage telemetry channels with dedicated ADCs, allowing simultaneous monitoring of the receiver supply voltage (V-PWM) (up to 12V), the XT30 power input (up to 12V), and an EXT-V input for monitoring external battery voltages up to 70V. Serial connectivity is available via a dedicated 4-pin JST-GH locking UART\/CRSF port for telemetry devices and other serial peripherals.\u003c\/p\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img32\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_5.jpg?v=1789007545\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img33\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_6.jpg?v=1789007545\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"\" cke-id=\"img34\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_7.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img35\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_8.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003eFrom installation to operation, the ER12 focuses on practicality, with a clean PCB layout to reduce interference, MMCX antenna connectors for easy serviceability, and a durable injection-molded housing built for long-term use. \u003c\/p\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: start;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img36\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_9.jpg?v=1789007545\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img37\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_10.jpg?v=1789007545\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img38\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_13.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\n\n\u003ch2 style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); display: block; margin: 60px 0px 25px; font-family: Arimo, sans-serif; font-weight: 700; letter-spacing: 0.6375px; line-height: 1; font-size: 25.5px; color: rgb(28, 29, 29); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(255, 42, 0);\"\u003e\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); text-decoration: underline;\"\u003e⚠️ XT30 Power Input Notice\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003e\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003eXT30 Power Input:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eThe XT30 provides direct battery voltage to the receiver and PWM power rail. Output voltage matches the input voltage. Use only servos rated for the applied voltage. High-voltage systems (2S LiPo\/Li-ion) require HV-rated servos. Standard 5V servos must be powered through a regulated 5V supply or the standard servo power input pins.\u003cbr style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255);\"\u003e\nWhen using the XT30 to power the receiver and servos, the ESC’s 5V\/BEC wire\u003cspan\u003e \u003c\/span\u003e\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003emust be disconnected\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto prevent back-feeding and possible damage.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cstrong style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); font-weight: 700;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eEXT-V Power Input:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eThe EXT-V input is accessed through the 2-pin JST-GH connector. Connect the red wire to the positive (+) terminal of the battery or ESC. The ER12 provides independent ADC channels for monitoring V-EXT and V-XT30, allowing it to accurately detect and report the appropriate input voltage for your installation.\u003cbr style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255);\"\u003e\nDesigned for large-scale systems using multiple servos and long wiring runs.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch2 style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); display: block; margin: 60px 0px 25px; font-family: Arimo, sans-serif; font-weight: 700; letter-spacing: 0.6375px; line-height: 1; font-size: 25.5px; color: rgb(28, 29, 29); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eSpecification\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px 30px; padding: 0px; text-rendering: optimizelegibility; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eItem: ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eInput Voltage: DC 5.0 – 12.0V\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eWireless Protocol: ExpressLRS\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eOutput Channels: 12CH PWM\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eSerial Output: CRSF \/ SBUS\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eTelemetry Power: Up to 100mW (adjustable via LUA)\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eVoltage Detection Range (EXT-V): DC 4.0 – 70V\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eBus Interface: CRSF\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eAntenna: 25 cm high-sensitivity, MMCX connector\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eWeight: 22.5 g (without antenna)\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eDimensions: 51.0 × 37.6 × 14.5 mm\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eFirmware Target: RadioMaster Dual 2.4GHz\/900MHz Receiver\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eDevice Name: ER12 Dual Band True Diversity + 12×PWM RX\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eELRS FW Version: Requires version 4.1.0 or Higher\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); display: block; margin: 60px 0px 25px; font-family: Arimo, sans-serif; font-weight: 700; letter-spacing: 0.6375px; line-height: 1; font-size: 25.5px; color: rgb(28, 29, 29); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003eSize\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: start;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img39\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_11.jpg?v=1789009841\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\n\n\u003ch2 style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); display: block; margin: 60px 0px 25px; font-family: Arimo, sans-serif; font-weight: 700; letter-spacing: 0.6375px; line-height: 1; font-size: 25.5px; color: rgb(28, 29, 29); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003ePackage Includes\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003cul style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px 0px 25px 30px; padding: 0px; text-rendering: optimizelegibility; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003e1 * ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e\u003cspan style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); color: rgb(0, 0, 0);\"\u003e2 * 2.4GHz Antennas\u003c\/span\u003e\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e2 * Dual-Band Antennas\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e1 * Voltage Telemetry Cable (Type-B)\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e1 * ELRS RX SBUS Cable\u003c\/li\u003e\n\t\u003cli style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin-bottom: 0px;\"\u003e1 * CRSF Cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"box-sizing: border-box; border-color: rgb(229, 231, 235); outline-color: rgb(0, 0, 255); margin: 0px; color: rgb(28, 29, 29); font-family: Arimo, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: 0.4px; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: start;\"\u003e\u003c\/p\u003e\u003cdiv\u003e\u003cimg alt=\"ER12 PWM - Dual-Band GEMINI and GEMINI-X Receiver\" cke-id=\"img40\" referrerpolicy=\"no-referrer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/EN_PC_12.jpg?v=1789007544\" style=\"box-sizing: border-box; border: 0px none; outline-color: rgb(0, 0, 255); max-width: 100%; margin: 0px; height: auto; float: none;\"\u003e\u003c\/div\u003e\n","brand":"HobbyGOAT","offers":[{"title":"CN 2.4G Version","offer_id":50507607113781,"sku":"Radiomaster ER12-CN 2.4G Version","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/5547\/4485\/files\/ER12-1_1800x1800_dc320dd7-85cf-48ab-abc3-a3ef4c0ca774.jpg?v=1790303492","url":"https:\/\/hobbygoat.com\/products\/radiomaster-er12-pwm-dual-band-gemini-and-gemini-x-receiver","provider":"HobbyGOAT","version":"1.0","type":"link"}