This is 5.5mm x 2.1mm male to male DC adapter power supply cable.
The 5.5 x 2.1mm plug jack power cable can be easily connect devices that require male to male plug.
The size of DC plug is 5.5mm x 2.1mm, the outer diameter is 5.5mm, and the inner diameter is 2.1mm.
The length of cable is about 3 ft, black color.
This 5.5 x 2.1 mm male to male DC power cable cord is widely used in IP camera, CCTV surveillance security camera, LED strip, DVR, router, invoice printer, low voltage application equipments etc.