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Product detail:1.FOUR VIDEOS AND RS485 CONTROL can translate in a single coxial cable
2.The cable use SYV /SYWV
3.The signals can translate about 800 meters far away
4.The rate of Rs485 :from 300-115200bps;
5.Built in mdl/sda
6.This device can be overlay ,and operationg is very easy
7.Power in from dc 9-18V.
