Description The RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver is a cutting-edge true diversity dual-band receiver featuring dual LR1121 RF transceivers, designed to leverage the advanced ExpressLRS Gemini Xrossband protocol (Gem-X). It seamlessly supports both the 2.4GHz and Sub-G 900MHz bands, and its dual T-type antennas provide superior reception sensitivity and connection stability for optimal performance. 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. 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 Specifications: 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: 2.4GHz / Sub-G 900MHz Telemetry Power: 100mw Maximum receive refresh rate: DK500Hz / K1000Hz Minimum receiver refresh rate: 50Hz Working voltage: DC 5.0 – 12.6v Weight: 1.7g (without antenna) Dimension: 22mm * 18mm * 4mm 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 Weight: Dimensions: Package Includes: 1 x RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver
