... 8CHS 800mW wireless Audio Video Transmitter,digital display,transmission is 1600m in open fields. 1.2G 8CHS 800mW wireless Audio Video Transmitter(FOX ... -800A)Feature:Digital play,8CH transmitter,credibility,synchro transmitting AV siganl,use for mid-distance of wireless ... and yellow plug connect to camera's audio and video apart.And black one connects camera's ...