Okayo CAM-9T Manual page 6

WIRELESS ENG / EFP SYSTEM
Bodypack Transmitter:
Press and hold the set button for 1 second until backlit screen turns to
white and channel number flashes. Press  or  button to select
preferred channel on receiver and transmitter. Press the set button again
to confirm newly selected channel.
Handheld
Press and hold  or  button for 1 second until backlit screen turns to
white and channel number flashes. Press  or  button to select
preferred channel on microphone. The newly selected channel will
automatically be confirmed after being idled for 2 seconds.
Make sure both receiver and transmitter are set at same channel for
!
correct communication.
Microphone:
2