ER3PRO PWM – Dual-Band GEMINI / GEMINI-X Receiver
Advanced dual-band performance, compact design, and reliable telemetry — engineered for demanding RC applications at Aerobertics.
The ER3PRO PWM is a compact, full-featured ExpressLRS receiver designed for models where RF performance, true diversity, telemetry, and connectivity are essential. Featuring Dual-Band GEMINI X technology (2.4GHz + Sub-G 900MHz), it provides enhanced link reliability and robust signal performance in a space-saving package.
With 3 PWM output channels, serial support via CRSF or SBUS, flexible telemetry options, and dual-source voltage monitoring, the ER3PRO offers an impressive range of features while keeping installation simple and efficient.
Key Features
- Dual-Band GEMINI X: 2.4GHz + Sub-G 900MHz for enhanced RF performance and link reliability.
- True Diversity: Dual-band receiver architecture designed for demanding RC applications.
- 3 PWM Outputs: Direct servo connectivity in a compact receiver format.
- Serial Output: Supports CRSF and SBUS for flexible integration with compatible systems.
- External UART Port: Dedicated locking connector for telemetry, external devices, and future system expansion.
- Dual-Source Voltage Telemetry: Monitor two power sources independently through dedicated ADC inputs:
- EXT-V: 4.0–70V
- V-PWM / Receiver Supply: up to 12V
- Adjustable Telemetry Power: Up to 100mW, configurable via ExpressLRS LUA.
- MMCX Antenna Connectors: Secure, durable, and replaceable antenna connections.
- Wi-Fi & WebUI: Convenient configuration and firmware updates without removing the receiver from the model.
- Durable Injection-Molded Housing: Compact and robust protection for long-term use.
- ExpressLRS Compatibility: Compatible with ExpressLRS transmitters and modules, including radios with built-in ELRS.
Technical Specifications
| Input Voltage | DC 5.0–12.0V |
| Wireless Protocol | ExpressLRS |
| RF System | Dual-Band GEMINI X – 2.4GHz + Sub-G 900MHz |
| Output Channels | 3CH PWM |
| Serial Output | CRSF / SBUS |
| Telemetry Power | Up to 100mW, adjustable via LUA |
| EXT-V Detection Range | DC 4.0–70V |
| V-PWM Detection Range | Up to 12V |
| Bus Interface | CRSF |
| Antenna Connector | MMCX |
| Antenna | 25cm high-sensitivity antenna |
| Weight | 13.5g (without antennas) |
| Dimensions | 49.2 × 26.8 × 13.0mm |
| Firmware Target | RadioMaster Dual 2.4GHz/900MHz Receiver |
| Required ELRS Version | ExpressLRS 4.1.0 or higher |
| Device Name | ER3Pro Dual Band True Diversity + 3×PWM RX |
Applications
The ER3PRO is ideal for RC aircraft and models requiring a combination of advanced RF performance, reliable telemetry, PWM servo outputs, and flexible connectivity without sacrificing valuable installation space.
Whether used in aerobatic aircraft, sport models, gliders, or other demanding RC applications, the ER3PRO delivers the versatility and reliability expected from a modern ExpressLRS receiver.
Package Contents
- 1 × ER3PRO PWM – Dual-Band GEMINI / GEMINI-X Receiver
- 2 × 2.4GHz Antennas
- 2 × Dual-Band Antennas
- 1 × Voltage Telemetry Cable (Type-B)
- 1 × CRSF Cable
- 1 × ELRS RX SBUS Cable
The Aerobertics Touch
At Aerobertics, we look for equipment that combines performance, reliability, and practical design. The ER3PRO is exactly that kind of receiver: compact enough for tight installations, powerful enough for demanding models, and versatile enough to integrate into a wide range of RC setups.
