Many customer know Twisted Pair Transmission System-Passive Series  (No power required.)   Using CAT5 networking cable to transmit a full motion B/W camera video signal to 300M, color up to 200M.(DVR-100M)   Distance Up to 1Km when used with an active receiver.Our 1Ch Passive Twisted Pair Transmission System three groups of core,anti-jamming circuit,Surge Protective

we also have make the water proof three groups of core,anti-jamming circuit,Surge Protective

Twisted Pair Transmission System-Active Series      Using CAT5 networking cable to transmit a full motion B/W camera video signal to 2400M, color up to 1500M.(DVR-300M)