... 300metres, lightning protection,NA-600A-1: passive Twisted-Pair Video Transmission, control distance 600metres, lightning protection.NA ... -5001B: active Twisted-Pair Video Transmission, AC12, 1A, control distance 2500metres, ... can be pulled outCoaxial video interface protection:2KVTwisted pair transmission interface protection:2KV(Differential mode), 4KV ...