Hanvex HDCQ3 3ft 2.1mm x 5.5mm DC Plug Extension Cable for 12V Power Adapter and more, 20AWG Cord for CCTV, LED Hanvex 2.1mm x 5.5mm DC Power Supply Extension Cord, Male to Female Cable - 3 ft, 20AWG, UL 2468 (UL Component) Connectors - Female: 2.1mm x 5.5mm jack. Male: 2.1mm x 5.5mm plug. Spring locked tip for solid connection. For DC power - Recommended up to 36 volt, max load 3 amp or less This cable will only work with power adapter with 2.1mm x 5.5mm plug and not other sizes.