Summary
GEPRC ELRS 915M/2.4G C3 GemX Gemini Receiver is a new dual-band receiver system developed based on the ExpressLRS open-source project. It is designed with the Semtech LR1121 (3rd generation RF chip) and ESP32-C3 chip, supporting both 150–960 MHz (sub-GHz) and 2.4 GHz bands, delivering advanced simultaneous dual-band transmission.
It supports up to 1000 Hz (FSK) refresh rate and comes with 915M/2.4G dual-band antennas, allowing flexible switching between 915M Gemini, 2.4G Gemini, and 915M+2.4G Dual-Band modes (It requires the use of GemX TX). When operating in dual-band mode, the system achieves enhanced anti-interference performance and more stable connectivity, ensuring excellent results for both close-range racing and long-range flights. It is also fully compatible with single-band ELRS TX modules, offering outstanding versatility.
Equipped with a TCXO, it maintains frequency stability under varying temperatures. The TLM power reaches up to 100 mW, and the receiver features a built-in WiFi antenna for easy firmware upgrades via WiFi. With the SH1.0 connector, installation is simple and efficient. Additionally, after flashing TX firmware, it can function as a Gemini Xrossband TX module.
Feature
- Advanced ExpressLRS 915M/2.4G dual-frequency system
- Based on Semtech’s third-generation LR1121 RF chip
- Compact at 18×23.6×5.7mm and weighing just 1.6g
- Supports 915M Gemini, 2.4G Gemini, 915M+2.4G dual-RF
- Features a temperature-compensated crystal oscillator (TCXO) for stable performance in varying temperatures
- Telemetry power up to 100mW
- Refresh rate up to 1000Hz
- Supports WiFi firmware updates
- Includes an SH1.0 connector for easy installation
Specifications
- Model: GEPRC ELRS 915M/2.4G C3 Gemini Xrossband Receiver
- Dimension: 18×23.6×5.7mm
- Weight: 1.6g (only receiver)
- Chips: ESP32-C3, LR1121x2
- Crystal Oscillator: TCXO
- Frequency Bands: 915MHz Gemini,2.4GHz Gemini,915M+2.4G Dual-Band
- Refresh Rate: 25Hz-1000Hz(LoRa,FSK)
- Serial Output Protocol: CRSF, SBUS, SUMD, DJI RS2 Pro, MAVLink
- Operating Voltage: 5V
- Antenna Connector: ipex1
- TLM Power: 100mW
- Firmware: GEPRC C3 900/2400 Gemini Xrossband RX
Includes
1 x GEPRC ELRS 915M/2.4G C3 Gemini Xrossband Receiver
2 x 915M/2.4G Dual-band T-Antennas(ipex1 80mm)
1 x Receiver silicone cable(SH1.0 4pin 100mm)
1 x Heat shrink tube
1 x User manual















