Ksmile&reg; 10 x Male + 10 x Female 2.1x5.5mm DC Power Cable Jack Adapter Connector Plug Led Strip CCTV Camera Use 12V 10Female +10Male Pack 2.1 x 5.5mm CCTV Camera DC Power Plug Connector. Simply & Professional Internal diameter 2.1mm External diameter 5.5mm This CCTV Camera DC Power Connector will provide a great connection