Transmitter:
On channel 1, press and hold the PF2 button, and power it on simultaneously, and then red light flashes.
Receiver:
On channel 2, press and hold the PF2 button, and power it on simultaneously, and then green light flashes.
Press the PTT button of the transmitter, the red light is flashing and data is being transmitted. The green light of the
receiver is flashing and data is being received.