Receiver RadioMaster XR1 Nano Multi-Frequency ExpressLRS 2.4GHz 

The XR1 Receiver is a versatile, ultra-compact ExpressLRS receiver, measuring just 20x13mm. Powered by the advanced third-generation Semtech LR1121 transceiver, the XR1 operates seamlessly on 2.4GHz. 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
- ESP32C3 high-performance MCU
- Semtech LR1121 2.4GHz 
- Secondary UART port
- Castled pads for easy soldering 

Specification:
Item: XR1 Nano Multi-Frequency ExpressLRS Receiver
Type: ISM2.4 
MCU: ESP32C3
RF chip: Semtech LR1121
RF connector: IPEX-1
Antenna: 1x T-Antenna 2.4GHz
Frequency Range: 2.4GHz
Telemetry Power: 100mW
Maximum Packet rate: DK500Hz / K1000Hz
Minimum Packet refresh rate: 50Hz
Working voltage: 5V
Weight: 1.0g (without antenna)
Dimension: 20x13x3mm
Firmware Version: ExpressLRS v3.5.1 pre-installed
FW Target:  RadioMaster XR1 2.4
Bus interface 1: CRSF
Bus interface 2: UART

Package Include: 
1x XR1 Nano Multi-Frequency ExpressLRS Receiver
1x T Antenna 2.4GHz
1x CRSF wire
3x Heat-Shrinkable Tube