Radiomaster XR4 Gemini Xrossband Dual-Band ELRS Receiver

Radiomaster XR4 Gemini Xrossband Dual-Band ELRS Receiver

Product description

The XR4 receiver is a state-of-the-art true diversity dual-band receiver with two LR1121 RF transceivers utilizing the advanced ExpressLRS Gemini Xrossband (Gem-X) protocol. It seamlessly supports both the 2.4 GHz and sub-G 900 MHz bands, and its two T-antennas provide excellent receive sensitivity and link stability for optimal performance.

The XR4 is equipped with two independent RF circuits and offers versatile operating modes, allowing you to switch between Gemini single-frequency or Xrossband dual-band mode. 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 high frame rate, the XR4 features a stable, rock-solid RF connection, even over demanding long distances or in challenging environments. Its compact, lightweight design is perfect for drones and fixed-wing models, providing reliable connectivity in critical situations where every signal counts. The XR4 ensures you have the most secure and robust RF connection on the market, offering unbeatable reliability in the most demanding conditions.

Features

• True diversity and dual band
• Unsurpassed reliability with ExpressLRS Gemini Xrossband
• Compatible with ExpressLRS 2.4 GHz, Sub-G 900 MHz, Gemini and Gemini Xrossband (Gem-X)
• ESP32D4 high performance MCU
• Dual Semtech LR1121 transceiver
• Secondary UART connector for extended functionality
• Castled pads for easy soldering

Specification

• Item: XR4 Gemini Xrossband dual-band receiver
• MCU: ESP32D4
• RF chip: LR1121 x 2
• RF connector: IPEX-1 X 2
• Antenna: Dual-band T-antenna x 2 (included)
• Frequency range: 2.4 GHz / Sub-G 900 MHz
• Telemetry power: 100 mW
• Maximum receiver update rate: DK500Hz / K1000Hz
• Minimum receiver update rate: 50Hz
• Operating voltage: DC 5.0 - 12.6 V
• Weight: 1.7 g (without antenna)
• Dimensions: 22 mm * 18 mm * 4 mm
• Firmware version: ExpressLRS v3.5.1 pre-installed
• FW target: RadioMaster XR4 2.4/900 Gemini RX
• Bus interface 1: CRSF
• Bus interface 2: UART