... is 1600m in open fields. 1.2Ghz 800mW 8CHS wireless transceiver,Receiver Kit(FOX-800A)Feature:Digital play,8CH transmitter,credibility,synchro ... .B.Push the CONTROL button,can change teh channel of receiver.Meanwhile,push it and last several seconds,can colse the ... .C.Set the same channel with transmitter and receiver. 4.Package Including: 12 channel Receiver, Transmitter, two pcs of small antennas, AV ...