10ft 12V 2.1mm x 5.5mm Plug DC Power Extension Cable Universal Extension Cords Compatible with 12V Power Adaper for Home Security Camera IP Camera DVR Black DC 12-Volt, DC size 5.5mm(outer dia.)*2.1mm (inner dia.) PVC Outer Jack, 3m (10Feet) long, Black Color Extend 10Ft power cable for 12v camera's with regular DC power supply. Also work with other brand 12 volt cameras Connectors - Female: 2.1mm x 5.5mm jack. Male: 2.1mm x 5.5mm barrel plug. Spring locked tip for solid connection. 12V DC Supply Adapter Extension Cord/Cable Compatible with Foscam IP camera and NVR security system FI9900P, FI9928P, FI9900EP, FI9853EP, FI9851P, FI9901EP,FI9961EP,FI9828P Reolink RLC-410 RLC-410S RLC-410WS RLC-411 RLC-411S RLC-411WS RLC-423 etc Used for Ip camera, DVR Standalone, Audio camera LED, Car, more. This cable will only work with power adapter with 2.1mm x 5.5mm plug and not other sizes.