1:long range video transmitter receiver 2:two levels of lighnting 3:1/4/8/16channels 4:300/600/1500/ ... distance: 300metres, 600metres, and 2500metres. support all of the video format, include PAL, NTSC, SECAM, compatible with post, real ... pair transmission interface:Blinding post can be pulled outCoaxial video interface protection:2KVTwisted pair transmission interface protection:2KV(Differential ...