品牌cctv型號cctv線芯材質裸銅線芯數(shù)3+1護套材質PVC PE PU電線最大外徑4-8（mm）主要用途監(jiān)控信號延長線產品認證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.。