SMAKN Power Splitter Adapter Cable Dc 1 Female to 8 male for Cctv Surveillance Security Camera 8Ch Power Supply Splitter Cable for Security Cameras 1 Female & 8 Male Adaptor Input & Output 12VDC Plug Diameter: 5.5 mm outer, inner 2.1 mm Convenient and cost effective way to power up 8 cameras with 1 power adapter