What makes the XR4's dual-band (2.4GHz/900MHz) feature unique?

The XR4 uses Gemini Xrossband technology to simultaneously operate on both 2.4GHz and 900MHz bands, ensuring unmatched reliability in challenging environments. This dual-band redundancy minimizes signal interference and extends range, making it ideal for long-range drones or areas with heavy RF congestion.

Is this receiver compatible with existing ExpressLRS systems?

Yes, the XR4 is fully compatible with ExpressLRS 2.4GHz, 900MHz, and Gemini/Gemini Xrossband (Gem-X) protocols. Ensure your transmitter module runs ExpressLRS v3.0 or later for full feature support.

How do I configure and update the receiver?

The built-in Wi-Fi module allows easy firmware updates and configuration via any web browser (WebUI). Simply connect to the receiver's Wi-Fi network and access the intuitive interface on your PC or mobile device.

What hardware advantages does the XR4 offer?

It features an ESP32D4 high-performance MCU and twin Semtech LR1121 transceivers for ultra-low latency (<10ms) and high refresh rates (up to 500Hz). The secondary UART port enables advanced telemetry and peripheral integration.

Can I use this for competitive FPV racing and long-range builds?

Absolutely. With true diversity antennas, dual independent RF circuits, and castled solder pads for robust connections, the XR4 delivers rock-solid signal stability in both high-speed racing scenarios and extended-range applications.

radiomaster xr4 gemini xrossband receiver

Radiomaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver

Q: Can I use this for competitive FPV racing and long-range builds?

Absolutely. With true diversity antennas, dual independent RF circuits, and castled solder pads for robust connections, the XR4 delivers rock-solid signal stability in both high-speed racing scenarios and extended-range applications.

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Top highlights

True Diversity & Dual-Band.
Unmatched reliability with ExpressLRS Gemini Xrossband.
Compatible with ExpressLRS 2.4GHz, Sub-G 900MHz, Gemini & Gemini Xrossband (Gem-X).
ESP32D4 high-performance MCU.
Twin Semtech LR1121 Transceiver.
Secondary UART port for advanced functionality.
Castled pads for easy soldering.

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Built with two independent RF circuits, the XR4 offers versatile operation modes, allowing you to switch between Gemini single-frequency or Xrossband dual-band modes, and can be tailored to your specific needs. The integrated Wi-Fi module simplifies firmware updates and configuration via a user-friendly WebUI on your PC or mobile device.

With ultra-low latency and a high refresh rate, the XR4 excels in delivering a stable, rock-solid RF link, even in demanding long-range or challenging environments. Its compact, lightweight design is perfect for drones, and fixed-wing models, offering reliable connectivity in critical situations where every signal matters. The XR4 ensures you maintain the most secure and robust RF link available, providing unbeatable reliability in the most demanding conditions.

radiomaster xr4 gemini xrossband dual band expresslrs receiver

Ultra-Low Latency & High Refresh Rate

ExpressLRS Gem-X protocol delivers <1ms latency and 500Hz refresh rates for precision control in drones and fixed-wing models.

Lightweight, Versatile Design

Compact and durable construction suits FPV drones and RC models, ensuring reliable connectivity without adding bulk.

radiomaster xr4 gemini xrossband band expresslrs receiver uart

Universal RadioMaster ELRS Compatibility

Seamlessly integrates with all RadioMaster ExpressLRS devices, including TX165 MKII transmitters, ZORRO/POCKET compact radios, and RANGER/BANDIT long-range modules. Modular design ensures plug-and-play reliability for FPV drones and RC models.

radiomaster xr4 gemini expresslrs receiver

radiomaster xr4 gemini xrossband expresslrs receiver

Dual-Band True Diversity for Unmatched Reliability

Dual 2.4GHz/900MHz bands and twin LR1121 transceivers ensure stable connections in long-range or interference-heavy environments with seamless switching between frequencies.

radiomaster xr4 gemini xrossband dual band expresslrs receiver lr1121

radiomaster xr4 gemini lr1121 expresslrs receiver

Specification

Weight & Size

radiomaster xr4 gemini band expresslrs receiver size

Package

Recommendation

Reviews

n*******y
Verified

It arrived quickly. This receiver is very good. There are no limits in flight. It is also easy to set up. I recommend it to everyone. Thank you Mepsking!

Model：XR4

Additional reviews after 13 days
Very good.

FAQ Feel free to ask us any questions

What makes the XR4's dual-band (2.4GHz/900MHz) feature unique?: The XR4 uses Gemini Xrossband technology to simultaneously operate on both 2.4GHz and 900MHz bands, ensuring unmatched reliability in challenging environments. This dual-band redundancy minimizes signal interference and extends range, making it ideal for long-range drones or areas with heavy RF congestion.
Is this receiver compatible with existing ExpressLRS systems?: Yes, the XR4 is fully compatible with ExpressLRS 2.4GHz, 900MHz, and Gemini/Gemini Xrossband (Gem-X) protocols. Ensure your transmitter module runs ExpressLRS v3.0 or later for full feature support.
How do I configure and update the receiver?: The built-in Wi-Fi module allows easy firmware updates and configuration via any web browser (WebUI). Simply connect to the receiver's Wi-Fi network and access the intuitive interface on your PC or mobile device.
What hardware advantages does the XR4 offer?: It features an ESP32D4 high-performance MCU and twin Semtech LR1121 transceivers for ultra-low latency (<10ms) and high refresh rates (up to 500Hz). The secondary UART port enables advanced telemetry and peripheral integration.
Can I use this for competitive FPV racing and long-range builds?: Absolutely. With true diversity antennas, dual independent RF circuits, and castled solder pads for robust connections, the XR4 delivers rock-solid signal stability in both high-speed racing scenarios and extended-range applications.