Receiver RadioMaster ER3 PRO Dual-Band GEMINI and GEMINI-X PWM

Product detailed description

Receiver RadioMaster ER3 PRO Dual-Band GEMINI and GEMINI-X PWM

The RadioMaster ER3 PRO is a compact ExpressLRS receiver designed for space-constrained aircraft and vehicle installations where reliable control, telemetry and connectivity are essential. Its dual-band GEMINI-X RF system operates on both 2.4GHz and Sub-G 900MHz, providing a robust control link with up to 100mW telemetry output power.
With 3 PWM outputs, CRSF/SBUS serial support and independent voltage telemetry for two power sources, the ER3 PRO combines comprehensive functionality with a compact footprint. MMCX antenna connectors, locking telemetry connectors, Wi-Fi configuration and a durable injection-molded housing make it practical for demanding installations.

Features:
- ExpressLRS Performance: Low latency, high reliability, and excellent link quality with flexible configuration options.
- Dual-Band Gemini X (2.4GHz + Sub-G 900MHz): Utilizes both frequency bands to provide enhanced link reliability across a wide range of operating environments.
- Up to 100mW Telemetry Output: Increased telemetry output power for improved data reliability and range.
- 3 PWM Outputs + Serial Support: Compact PWM output with CRSF and SBUS options.
- External UART Port (Locking Connector): Dedicated interface for telemetry, external devices, and system expansion.
- Independent Multi-Source Voltage Telemetry: Monitor up to two power sources simultaneously using dedicated ADC channels: EXT-V (up to 70V), receiver supply voltage (V-PWM) (up to 12V).
- MMCX Antenna Connectors: Durable, replaceable antennas with a secure connection.
- Wi-Fi Updates & WebUI: Configure and update directly without disassembly.
- Durable Injection-Molded Housing: Compact, protective enclosure for long-term reliability.
- Application: A compact, full-featured receiver for models that require advanced RF performance, telemetry, and connectivity in a space-efficient package.
- Compatibility: Compatible with all ExpressLRS transmitters and modules, including radios with built-in ELRS. 

Specifications:
Item: ER3 PRO PWM - Dual-Band GEMINI and GEMINI-X Receiver
Input Voltage: DC 5.0 – 12.0V
Wireless Protocol: ExpressLRS
Output Channels: 3CH PWM
Serial Output: CRSF / SBUS
Telemetry Power: Up to 100mW (adjustable via LUA)
Voltage Detection Range (EXT-V): DC 4.0 – 70V
Bus Interface: CRSF
Antenna: 25 cm high-sensitivity, MMCX connector
Weight: 13.5 g (without antenna)
Dimensions: 49.2x26.8x13.0 mm
Firmware Target: RadioMaster Dual 2.4GHz/900MHz Receiver
Device Name: ER3Pro Dual Band True Diversity + 3xPWM RX
ELRS FW Version: Requires version 4.1.0 or Higher

Package includes:
1x ER3PRO PWM - Dual-Band GEMINI and GEMINI-X Receiver
2x 2.4GHz Antennas
2x Dual-Band Antennas
1x Voltage Telemetry Cable (Type-B)
1x CRSF Cable
1x ELRS RX SBUS Cable