The XR3 Receiver is a versatile, ultra-compact ExpressLRS receiver measuring just 20 × 15 mm. Powered by the third-generation Semtech LR1121 transceiver, the XR3 operates on either the 2.4 GHz or Sub-G 900 MHz bands. Whether using 2.4 GHz or 900 MHz, the XR3 delivers strong range and sensitivity in a small, lightweight package—well suited for a wide range of builds. With the reliability of ExpressLRS, you can focus on operation without worrying about link quality.

Designed for convenience, the XR3 features built-in Wi-Fi for effortless configuration and firmware updates. Access and manage settings through an intuitive WebUI on your PC or mobile device with ease.

Features
Antenna Diversity for improved signal stability and range
ExpressLRS 2.4GHz or Sub-G 900MHz
ESP32C3 high-performance MCU
Semtech LR1121 Transceiver
Additional UART port
Secondary port for advanced functionality
Castled pads for easy soldering

Specification
Item: XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
Type: ISM2.4 or CE868
MCU: ESP32C3
RF Chip: LR1121
RF connector: IPEX-1 X 2
Antenna: 2x T-Antenna (Either 2.4GHz, 900Mhz or Dual-band depending on selected package)
Frequency Range: 2.4GHz / Sub-G 900MHz
Telemetry Power: 100mw
Maximum receive refresh rate: DK500Hz / K1000Hz
Minimum receiver refresh rate: 25Hz
Working voltage: DC 4.5 – 8.4V
Weight: 1.3g (without antenna)
Dimension: 22mm * 15mm * 4mm
Firmware Version: ExpressLRS v3.5.1 pre-installed
FW Target: RadioMaster XR3 2.4/900 Diversity RX
Bus interface 1: CRSF
Bus interface 2: UART

Package Includes
1 * XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
2 * T Antenna (Either 2.4GHz, 900Mhz or Dual-band depending on selected package)
1 * CRSF Wire
3 * Heat-Shrinkable Tube
1 * Manual Card