The XR3 Receiver is a versatile, ultra-compact ExpressLRS receiver, measuring just 20 x 15mm. Powered by the advanced third-generation Semtech LR1121 transceiver, the XR3 operates seamlessly on 2.4GHz OR Sub-G 900MHz bands. Whether you're flying on 2.4GHz or 900MHz, the XR3 delivers exceptional range and sensitivity in a small, lightweight package — perfect for any build. With the reliability of ExpressLRS, you can focus on flying 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

Specifications:

Type: ISM2.4, FCC915

MCU: ESP32C3

RF Chip: LR1121

RF connector: IPEX-1 X 2

Antenna: 2x T-Antenna

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 Included:

1x XR3 Nano Multi-Frequency ExpressLRS Receiver

2x T Antenna 

1x CRSF wire

3x Heat-Shrinkable Tube

1x Manual Card