RadioMaster DBR4 Dual Band Xross Gemini ELRS Receiver

RadioMaster DBR4 Dual Band Xross Gemini ExpressLRS Receiver

Introducing the DBR4 receiver: the perfect complement to the RadioMaster Nomad module. The DBR4 is a modern, dual-band, dual-channel Gemini receiver, ensuring seamless compatibility with the Nomad module. Designed for maximum performance, the DBR4 features two dual-band sections, each capable of simultaneously receiving 2.4GHz and 900MHz signals. This innovative solution allows for the reception of two data streams simultaneously, providing exceptional interference resistance and eliminating the risk of packet loss. With the DBR4, you can be confident that your signal remains strong and reliable, enabling you to push boundaries and explore new horizons. Elevate your RC experience with the unmatched connectivity and performance of the DBR4 receiver.

Features

• RF telemetry power: Max. 2x 100mW
• Unmatched reliability with dual-band ELRS Gemini Xrossband
• ExpressLRS Gemini 2.4GHz
• ExpressLRS Gemini 868/900MHz
• 4 separate antennas for optimal placement
• 20 x 20 mm mounting holes
• Xrossband GemX support

Specifications

• Model: DBR4 Gemini Xrossband ExpressLRS Receiver
• Type: ISM_2.4, FCC_915
• MCU: ESP32
• RF chip: Semtech LR1121 x 2
• RF telemetry power: Max. 100mW
• Antennas: 2 x 2.4GHz wires & 2 x 900MHz wires
• Frequency range: 2.404 - 2.479 GHz / 903.5 - 926.9 MHz
• Maximum receiver refresh rate: 500Hz (1000Hz in ExpressLRS V3.4)
• Minimum receiver refresh rate: 50Hz
• Operating voltage: DC 4.5 - 8.4V
• Weight: Without antennas 2.70g / With antennas 5.30g
• Dimensions: 27.20 * 27.20mm
• Firmware version: ExpressLRS v3.3.2 pre-installed
• Interface: CRSF

New Packet Rates

Sub-GHz 250Hz (-111dBm)

• Transmission acceleration: Faster packet rates with optimized sub-GHz performance.

Sub-GHz 200Hz Full (-111dBm)

• Optimization for Mavlink: Doubles the packet data compared to current 900 SX1276 hardware, providing a more stable connection and reduced interference.

Introducing K Modes

DK500 (Available in ExpressLRS V3.5)

• Modern FSK modulation with built-in error correction (FEC), designed for RC racing and stable transmission.

K1000 Full SubGHz (Available in ExpressLRS V3.5)

• 1000Hz in the 868/900MHz range, designed for maximum data throughput with MAVLink.

Weight

Size

Package Contents

• 1 * DBR4 Gemini Xrossband ExpressLRS Receiver
• 2 * 2.4 GHz Antennas
• 2 * 900 MHz Antennas
• 1 * CRSF Cable
• 4 * Red 4mm Vibration Dampeners
• 4 * Black 3mm Vibration Dampeners
• 1 * Instruction Card