The XR1 Receiver is a versatile, ultra-compact ExpressLRS receiver, measuring just 20 x 13mm. Powered by the advanced third-generation Semtech LR1121 transceiver, the XR1 operates seamlessly on 2.4GHz OR Sub-G 900MHz bands. Whether you’re flying on 2.4GHz or 900MHz, the XR1 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 XR1 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

• Telemetry RF power: 100mW
• ExpressLRS 2.4GHz or Sub-G 900MHz
• ESP32C3 high-performance MCU
• Semtech LR1121 2.4GHz & Sub-G 900MHz Transceiver
• Secondary UART port
• Castled pads for easy soldering

Specifications:

Item: XR1 Nano Multi-Frequency  ExpressLRS Receiver

Type: ISM2.4 or FCC915

MCU: ESP32C3

RF chip: Semtech LR1121

RF connector: IPEX-1

Antenna: 1x T-Antenna

Frequency Range: 2.4GHz or Sub-G 900MHz

Telemetry Power: 100mW

Maximum Packet rate: DK500Hz / K1000Hz

Minimum Packet refresh rate: 50Hz

Working voltage: 5V

Weight: 1.0g (without antenna)

Dimension: 20mm * 13mm * 3mm

Firmware Version: ExpressLRS v3.5.1 pre-installed

FW Target:  RadioMaster XR1 2.4/900 RX

Bus interface 1: CRSF

Bus interface 2: UART

Package Included:

1x XR1 Nano Multi-Frequency ExpressLRS Receiver

1x T Antenna 

1x CRSF wire

3x Heat-Shrinkable Tube

1x Manual Card