The XR4 is a dual-band, dual LR1121 RF transceivers Receiver! It supports the advanced ExpressLRS Gemini Xrossband protocol (Gem-X). Operating on 2.4GHz and Sub-G 900MHz provide superior reception and connection. With two RF circuits, it supports Gemini single-frequency and Xrossband dual-band modes. A built-in Wi-Fi module allows easy firmware updates and configuration via WebUI. Compact, lightweight, and designed for ultra-low latency, the XR4 ensures a stable RF link, making it perfect for drones and fixed-wing models in demanding environments.

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Features

• Compact and Lightweight
• Versatile Operation Modes
• Integrated Wi-Fi Module
• Dual T-Type Antennas
• True Diversity Design
• Dual-Band Support
• Advanced Protocol
• Ultra-Low Latency
• High Refresh Rate
• Reliable RF Link

Specifications

• Maximum Receive Refresh Rate: DK500Hz / K1000Hz
• Firmware Version: ExpressLRS v3.5.1 pre-installed
• Antenna: Dual-Band T Antenna x 2 (Included)
• Frequency Range: 2.4GHz / Sub-G 900MHz
• Item: XR4 ExpressLRS Xrossband Receiver
• Firmware Target: XR4 2.4/900 Gemini RX
• Minimum Receiver Refresh Rate: 50Hz
• Dimensions: 22mm x 18mm x 4mm
• Working Voltage: DC 5.0 – 12.6V
• Weight: 1.7g (without antenna)
• Telemetry Power: 100mW
• RF Chip: Semtech LR1121
• RF Connector: IPEX-1 x 2
• Bus Interface 2: UART
• Bus Interface 1: CRSF
• MCU: ESP32D4

Includes

• 1x RadioMaster XR4 Gemini Xrossband ELRS 2.4GHz/900MHz Dual-Band Diversity Receiver