Male 2.1x5.5mm dc power plug jack adapter connector for cctv description: simply and professional appearance for power cabling easier for camera installation, save time and more securer cable connection no electrical tap, no splicing, no crimping, but only a small screw driver specifications: material: pvc+metal colors: black whole size: approx.0.51*0.51*1.50inch/1.3*1.3*3.8cm male jack size: approx.0.22*0.08inch/5.5*2.1mm max transmission current: 20a(1v-38v) transmission voltage: 1v~38v