Set transmitter off
Connecting the battery to receiver (or 4 in 1 mix controller)
Press the bind keystoke for 1-2 seconds, LED indicator will twinkle constantly, which indicates that unbinding has completed. (as shown in the picture bellow)
Rebinding
Disconnect the receiver (or 4 in 1 mix controller)
Connect the receiver or 4 in 1 mix controller to the battery, the LCD indicator twinkles slowly
Turn on transmitter, LED on transmitter flashes
LED on receiver twinkling slowly to rapidly, and then turns solid, which indicate the binding is successful