品牌cctv型号cctv线芯材质裸铜线芯数3+1护套材质PVC PE PU电线最大外径4-8（mm）主要用途监控信号延长线产品认证UL 我公司??生??控?材，有意??系！！We are?supplier of high quality cctv / av extension cables.?We have 2x RCA connectors and one 2,1mm DC connector at each end. The cables must provide clean image with no interference and clean audio.??ranging from 20 to 50 meters long.。