Receiver Radiomaster DBR4 Xross Gemini ExpressLRS Dual Band 2.4GHz/900MHz

The RadioMaster DBR4 Xross Gemini ExpressLRS receiver supports simultaneous reception of signals in the 2.4GHz and 900MHz bands, which ensures stable communication. Two independent receiving sections minimize packet loss and reduce interference. The pre-installed ExpressLRS v3.3.2 firmware supports an update rate of up to 500Hz. Four antennas improve signal quality and provide optimal placement for reliable operation. The device is compatible with the CRSF protocol and runs on the ESP32 microcontroller. The telemetry power of 2×100mW guarantees stable feedback. Due to its compact size and 20×20mm mounting holes, the receiver can be easily integrated into various systems.

• Gemini dual-band, dual-channel receiver with support for simultaneous reception of 2.4GHz and 900MHz signals
• Exceptional interference reduction and minimized packet loss due to two independent receiving sections
• Four separate antennas for optimal positioning and enhanced signal reception
• 2 powerful 100mW telemetry units each for stable feedback
• 20*20mm mounting holes for easy integration into systems

• Frequency range: 2,404-2,479GHz/903,5-926,9МHz
• Type: ISM_2.4, FCC_915
• MCU: ESP32
• RF chip: Semtech LR1121x2
• RF telemetry power: max. 100mW
• Operating voltage: DC 4.5 - 8.4V
• Firmware version: ExpressLRS v3.3.2 pre-installed
• Maximum receive refresh rate: 500Hz (1000Hz coming soon in ExpressLRS V3.4)
• Minimum receiver refresh rate: 50Hz
• Antenna: 2 - 2.4GHz and 2 - 900MHz
• Bus interface: CRSF
• Size: 27.20*27.20mm
• Weight: 2.70g (without antennas)/5.30g (with antennas)

• 1 x DBR4 Gemini Xross band ExpressLRS receiver
• 2 x 2.4GHz antennas
• 2 x 900MHz antennas
• 1 x CRSF wire
• 4 x 4mm red damping rubber bands
• 4 x 3mm black damping rubber bands
• 1 x user manual