The receiver supports WIFI connection to write firmware, which is convenient and fast. With power amplifier (PA+LNA), it has 100mW telemetry output and better reaction speed. Theoretically compatible with all ELRS 2.4G transmitter modules on the market (provided firmware version 3.0 or above). Frequency range: 915MHZ FCC Maximum receive refresh rate: 500HZ Minimum receive refresh rate: 25HZ Operating voltage 5V Firmware: BETAFPV_900_RX3.2.0 Size: 11mm x 17mm x 4mm Indicator status: Double blinking: Code matching mode Blinking slowly: No transmission signal is received Steady on: The transmission signal is received Quick blinking: WIFI upgrade mode Frequency matching steps: 1. After the receiver is connected to the flight control, connect USB to power the flight control. The first time you insert the USB, when you see the receiver Disconnect USB as soon as the LED light goes out. Repeat the operation twice, when the third time to insert the USB LED start to double flash, receiver Enter the code matching mode 2. After connecting the 915M(868M) ELRS high frequency head module to the remote control correctly, copy the ELrs. LUA file to the remote control On the SD Card, the directory is SD Card/Scripts/tools, and then run ELRS.LUA to Bind 3. After the binding is successful, the LED on the receiver be steady on, and the telemetry signal can also be received. Colour:Photo Color Material:plastic+metal Package Contents: 1 x Receiver 1 x Wire 1 x T-antenna 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.