Radio Master DBR4 Dual Band Xross Gemini ExpressLRS Receiver
DBR4 Dual Band Xross Gemini ExpressLRS Receiver
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Features
- Dual-channel Gemini design enables simultaneous, independent reception of 2.4GHz and 900MHz signals.
- Full support for the revolutionary ExpressLRS Xrossband GemX protocol.
- Features four discrete antennas, ensuring optimal layout flexibility and enhanced RF reliability.
- Advanced interference rejection to eliminate packet loss in high-noise environments.
- The perfect companion for the RadioMaster Nomad module and dual-band systems.
- Equipped with a robust Advanced Cooling System for stable telemetry output.
- Standard 20x20mm mounting holes for easy stack or frame installation.
Specifications
| Item | DBR4 Gemini Xrossband ExpressLRS Receiver |
|---|---|
| RF Chip & MCU | Semtech LR1121 x 2 | ESP32 |
| Frequency Range | 2.404 - 2.479 GHz / 903.5 - 926.9 MHz |
| Telemetry RF Power | Max 100mW |
| Refresh Rate | Min 50Hz / Max 500Hz |
| Working Voltage | DC 4.5 - 8.4V |
| Bus Interface | CRSF |
| Firmware Version | ExpressLRS v3.3.2 (Pre-installed) |
| Dimensions / Mounting | 27.20 x 27.20 mm / 20x20mm hole pattern |
| Weight | 2.70g (without antennas) / 5.30g (with antennas) |
Package Includes
- 1 x DBR4 Gemini Xrossband ELRS Receiver
- 2 x 2.4GHz Wire Antennas
- 2 x 900MHz Wire Antennas
- 1 x CRSF Hookup Wire
- 4 x 4mm Red Vibration Dampeners
- 4 x 3mm Black Vibration Dampeners
- 1 x Manual Card