The third generation LR1121 chip is adopted, which supports 2.4GHz frequency band. Add UART output interface to provide more expansion possibilities. Compact tower antenna Name:XR2 Nano 2.4GHZ ExpressLRS Receiver Type:ISM-2.4 MCU:ESP32C3 chip: LR1121 Antenna: integrated 2.4GHz tower antenna Frequency range: 2.4GHz Radio frequency power: 10mw Maximum packet rate: DK500HZ Minimum packet refresh rate: 50Hz Operating voltage: 5V Weight: 0.8g Size: 16mmx12mmx6mm Firmware version: ExpressLRS v3.5.1 is pre-installed. Firmware target: for XR2 2.4 RX Bus interface 1: CRSF Bus interface 2: UART Colour:Black Material:Plastic Package Contents: 1 * receiver 1 * cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.