SNANSHI 8 Channel Power Cable Splitter 1 Female to 8 Male for Security CCTV Camera DC 1 Female to 8 Male Power Splitter Cable Type: 5.5x2.1mm Convenient and cost effective way to power up 8 cameras with 1 power adapter Outside Diameter: 5.5mm Inside Diameter(male): 2.1mm Pin Diameter(female):2.1mm Total Length: about 40cm