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RadioMaster XR4 Gemini dual-band ELRS receiver
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  • RadioMaster XR4 Gemini dual-band ELRS receiver
  • XR4 Gemini with 2.4GHz and 900MHz T-antennas
  • Xrossband ExpressLRS receiver with antenna diversity
  • RadioMaster XR4 Gemini – ELRS Receiver Dual-Band 2.4GHz + 900MHz
  • RadioMaster XR4 Gemini – ELRS Receiver Dual-Band 2.4GHz + 900MHz
  • RadioMaster XR4 Gemini – ELRS Receiver Dual-Band 2.4GHz + 900MHz
  • RadioMaster XR4 Gemini – ELRS Receiver Dual-Band 2.4GHz + 900MHz
  • RadioMaster XR4 Gemini – ELRS Receiver Dual-Band 2.4GHz + 900MHz
  • RadioMaster XR4 Gemini – ELRS Receiver Dual-Band 2.4GHz + 900MHz

Radiomaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver

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RadioMaster XR4 Gemini Xrossband – Dual-Band ExpressLRS Receiver

Advanced receiver with true antenna diversity and dual-band operation

The RadioMaster XR4 Gemini Xrossband is a compact, high-performance ExpressLRS receiver featuring dual independent LR1121 RF chips and T-type antennas. It supports both 2.4GHz and 900MHz bands simultaneously in Xrossband mode, or either band independently in Gemini mode. With built-in Wi-Fi and WebUI support, firmware updates and configuration are easy and cable-free.

Key Features

  • ● Dual-band operation: 2.4GHz and 900MHz with antenna diversity
  • ● Gemini and Xrossband modes for flexible RF control
  • ● Two independent Semtech LR1121 transceivers
  • ● Built-in Wi-Fi with WebUI – no tools required to update
  • ● Ultra-light: 22×18×4 mm, only 1.7g (without antennas)

Technical Specifications

  • ● Frequency: 2.4GHz and 868/915MHz Sub-G (simultaneous)
  • ● Telemetry Power: up to 100mW
  • ● Refresh Rates: 50Hz – 500Hz (2.4GHz) / up to 1000Hz (Sub-G)
  • ● Input Voltage: 4.5V – 8.4V DC
  • ● Interface: CRSF (UART)
  • ● Firmware: ExpressLRS v3.5.1 (pre-installed)

Package Contents

  • ● 1× XR4 Gemini Xrossband Receiver
  • ● 2× Dual-Band T-Antennas
  • ● 1× CRSF Cable
  • ● 3× Heat-Shrink Tubes
  • ● 1× Quick Start Card
ELRS long-range receiver with dual LR1121 chips

FAQ

Frequently Asked Questions about the RadioMaster XR4 Gemini Xrossband ExpressLRS Receiver

It's a dual-band receiver that supports both 2.4GHz and 900MHz simultaneously with Xrossband diversity.

The XR4 can receive from both 2.4GHz and 900MHz bands at the same time, automatically selecting the stronger link.

Yes – it supports full telemetry over the ExpressLRS protocol.

Yes, it includes a Wi-Fi module for configuration and firmware updates via WebUI.

The receiver operates at 5V.

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