RadioMaster XR4 Gemini Xrossband Dual-Band ELRS Receiver

Welcome to a new era of FPV reliability with the RadioMaster XR4 Receiver, a true diversity dual-band receiver built to power ExpressLRS Gemini Xrossband (Gem-X). Featuring dual LR1121 RF transceivers and independent RF circuits, it seamlessly handles both the 2.4GHz and Sub-G 900MHz bands while using dual T-type antennas to maximize reception and stability. Designed for drones and fixed-wing platforms, the XR4 combines low latency, high refresh rates, and flexible operation modes—Gemini single-frequency or Xrossband dual-band—to adapt to growing and demanding flight envelopes. An integrated Wi-Fi module brings effortless firmware updates and configuration via a WebUI on PC or mobile, so you stay current without hassle. In challenging environments, the XR4’s robust RF link stands out, delivering dependable performance where signal quality often varies. With its compact, lightweight form factor, it’s ready for agile mounting on small to mid-size aircraft, ensuring you won’t outgrow this receiver any time soon.

Features

• 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