... passive Twisted-Pair Video Transmission, control distance 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, lightning protection, 9*5.5*2.8cm.Specification:Item NA- ...