RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver

Key Features

• 📡 True Dual-Band Diversity
  Dual LR1121 transceivers for simultaneous 2.4GHz & 900MHz operation

• ⚡ Gemini XrossBand Protocol
  Advanced ExpressLRS technology for seamless band switching

• 🔧 Multiple Operation Modes
  Switch between single-frequency or dual-band modes as needed

• 📶 High-Performance Antennas
  Includes dual T-type antennas for optimal reception

• 🌐 WebUI Configuration
  Built-in Wi-Fi for easy firmware updates and setup via browser

• ⚖️ Ultra-Compact Design
  Only 1.7g without antennas - perfect for weight-sensitive builds

For more details and support, visit expresslrs.org.

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

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: 2.4GHz / Sub-G 900MHz
• Telemetry Power: 100mw
• Maximum receive refresh rate: DK500Hz / K1000Hz
• Minimum receiver refresh rate: 50Hz
• Working voltage: DC 4.5 - 8.4V
• 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

Download

• XR4 Receiver User Manual

Package Includes

• 1 * XR4 Gemini Xrossband Dual-Band Receiver
• 2 * Dual-Band T-Antenna
• 1 * CRSF Wire
• 3 * Heat-Shrinkable Tube
• 1 * Manual Card