OdiySurveil(TM) 10 Pairs Pack ,5 pairs 2.1x5.5mm Jack DC Power Connector Adapter , 5 pairs Coaxial Cat5 to BNC Female Video Balun Connector,4-Type Terminal 4Kinds connectors provide you more choices by your side,simply & Professional appearance for power cabling and Coaxial video balun connecting; Easier for camera installation, save time and more securer cable connection; 4Kinds 10pairs of DIY CCTV Male & Female Power Connectors for CCTV Project; Internal diameter of the plug: 2.1mm,Compatible with All CCTV Systems; Package Content : 5Pairs x DC Male Female Connectors,5Pairs x Coax CAT6 to BNC connectors.