This is a 1.2GHz 1000mW wireless transmitter and receiver kit with audio and video, mainly used for ... the line of FPV, UAV, RC airplanes, etc. The wireless transmitter has 4 channels; the frequencies are:1.080GHz 1.120GHz ... Carrier Ware: 5.5M (default) 6.0M(customized) Size of Transmitter: 60x28x10mm (LxWxH) Effective Transmission Distance: Min. 2km