A: R8FM is compatible with RadioLink T8FB/T8S/RC6GS V3/RC4GS V3/RC6GS V2/RC4GS V2/RC6GS/RC4GS.

A：R8FM supports 2 signals output, SBUS and PPM.

Receiver indicator is RED with all 8 channels output PPM signal.

Receiver indicator is Blue (Purple) with 8 channels output SBUS signal.

A：Short press the binding button (ID SET) twice within 1 second. When the Red LED is on, signal output is PPM. When the Blue/purple LED is on, signal output is SBUS.

A: The operating voltage range of R8FM is from 3V to 6V.

A：

1. Put the transmitter and the receiver close to each other (about 50 centimeters) and power both on.

2. Switch on the transmitter and the LED of R8FM will start flashing slowly.

3. There is a black binding button (ID SET) on the side of receiver. Press the button for more than 1 second and release, the LED will flash quickly, meaning binding process is ongoing.

4. When the LED stops flashing and is always on, binding is complete and there will be a signal tower shown on top of the screen of the transmitter. If not succeed, repeat the above steps.

Note: If bind to transmitters without screen like T8S or T8FB, the always on LED means binding completed.

A：The slow flashing LED means binding doesn’t succeed or the signal gets lost after binding completes.

A: Please follow this tutorial: https://www.youtube.com/watch?v=-e1XzRnMnhs

A: Please follow this tutorial: https://www.youtube.com/watch?v=nquuvM3hmtw

A: Please follow the guide: https://radiolink.com.cn/ttransmitter_betaflight_rssi_output

A: Please follow the guide: https://radiolink.com.cn/ttransmitter_pixhawk_rssi_output