DBR4 Dual Band Xross Gemini ExpressLRS Receiver

HP0157.0086

$29.99

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Introducing the DBR4 Receiver, a high-performance dual-band, dual-channel Gemini receiver designed for seamless compatibility with the RadioMaster Nomad Module.

The DBR4 features two independent dual-band receiver sections, each capable of simultaneously receiving 2.4GHz and 900MHz signals. This advanced architecture enables the receiver to process two data streams simultaneously, delivering excellent interference rejection, improved link reliability, and robust signal performance.

Built for demanding RC applications, the DBR4 provides a stable and resilient connection even in challenging RF environments. Whether you're pushing range or demanding maximum reliability, the DBR4 delivers the connectivity and performance you can count on.

DBR4 Dual Band Xross Gemini ExpressLRS Receiver

Features

Telemetry RF power: Max 2x 100mw
Experience unmatched reliability with dual-band ELRS Gemini Xrossband
ExpressLRS Gemini 2.4GHz
ExpressLRS Gemini 868/900MHz
4 Descrete antennas for optimal antenna arrangement
20 X 20mm mounting holes
Xrossband GemX support

Specification

Item: DBR4 Gemini Xrossband ExpressLRS Receiver
Type: ISM_2.4, FCC_915
MCU: ESP32
RF chip: Semtech LR1121 x 2
Telemetry RF power: Max 100mW
Antenna: 2 x 2.4GHz wires & 2 x 900MHz wires
Frequency Range: 2.404 - 2.479 GHz / 903.5 - 926.9 MHz
Maximum receive refresh rate: 500Hz (1000Hz coming soon in ExpressLRS V3.4)
Minimum receiver refresh rate: 50Hz
Working voltage: DC 4.5 - 8.4V
Weight: Without antennas 2.70g / With antennas 5.30g
Dimension: 27.20 *27.20mm
Firmware Version: ExpressLRS v3.3.2 pre-installed
Bus interface: CRSF

DBR4 Dual Band Xross Gemini ExpressLRS Receiver

New Packet Rates

Sub-GHz 250Hz (-111dBm)
- Delivers a faster 250Hz packet rate on the Sub-GHz band while maintaining excellent receiver sensitivity, providing a responsive and reliable control link.
Sub-GHz 200Hz Full (-111dBm)
- Provides a 200Hz full-resolution packet rate on 868/900MHz, delivering faster communication and improved link reliability compared with traditional SX1276-based 900MHz systems. Ideal for setups that demand responsive control and dependable telemetry performance.
Dual Band X150Hz (-112dBm)
- Gemini Mode: Combines simultaneous 2.4GHz and Sub-GHz transmission at a 150Hz packet rate. The dual-frequency architecture improves link robustness and helps maintain a stable connection in challenging RF environments.
Dual Band X100Hz Full (-112dBm)
- Enhanced Gemini Mode: Delivers simultaneous 2.4GHz and Sub-GHz transmission at 100Hz with full 16-channel resolution. Designed for maximum link stability while maintaining high-resolution control and reliable telemetry.
K Modes

DK500 — Coming with ExpressLRS V3.5
- Designed for demanding RC applications where speed and link reliability are equally important. K Modes use next-generation FSK modulation with integrated Forward Error Correction (FEC), helping recover data and reduce packet loss in challenging RF environments. When paired with compatible Gemini transmitters and receivers, DK500 provides an exceptionally robust control link for high-performance RC applications.
K1000 Full Sub-GHz — Coming with ExpressLRS V3.5
- Pushes Sub-GHz performance to an impressive 1000Hz packet rate on 868/900MHz. Developed for applications that prioritize maximum update speed and data throughput, K1000 maintains a highly responsive control link while delivering strong and stable performance.