After the receiver is connected to the flight controller, connect the USB to power the flight controller. After inserting the USB for the first time, disconnect the USB as soon as the LED on the receiver turns off. Repeat the operation twice, when the USB is inserted for the third time, the LED start to flash double, and the receiver enter the code matching mode After correctly connecting the 2.4G ELRS tuner module and the remote control, copy the ELRS.LUA file to the SD card in the remote control, the directory is SD Card/Scripts/tools, and then run ELRS.LUA for Bind operation After the binding is successful, the LED on the receiver become steady on, and the telemetry signal can be received at the same time<br><br>ESP8285 MCU SX1280IMLTRT RF Frequency range: 2400 MHZ To 2500 MHZ Maximum receiving refresh rate: 500HZ Minimum receiving refresh rate: 25HZ Working voltage: 5V RX24T: Half-wave dipole omnidirectional T-shaped antenna gain: 3.16dB (Due to different batches, the printed words on the product be different, which does not affect use) Colour:Black Material:PCB<br><br>Package Contents: 1x Receiver 1x T-antenna 1x Connection Cable<br><br>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.