Connector2.1mm x 5.5mm DC power cord extension,female to male. Length16.5FT/5M DC power extension cord.Two or more wires can be connected together to make it longer. UseTo extend the power supply adapter with 2.1mm x 5.5mm DC jack for any brand CCTV security camera,standalone DVR /NVR,router,invoice printer,LED strip and so one. CompatibilityWork with 24V 12V 9V 6V 5V or lower DC equipment.The maximum load current does not exceed 3A. Warranty30 days no-reason return, 2 years warranty ,lifetime support.