... 8CHS 800mW wireless Audio Video Transmitter,digital display,transmission is 1600m in open fields. 1.2G 8CHS 800mW wireless Audio Video Transmitter(FOX-800A) ... Push the CONTROL button,can change teh channel of receiver.Meanwhile,push it and last several seconds,can ... .C.Set the same channel with transmitter and receiver. 4.Package Including: 12 channel Receiver, Transmitter, two pcs of small antennas, ...