Hanvex HDCQ100 100ft 20AWG 2.1mm x 5.5mm DC Plug Extension Cable for Power Adapter, Male to Female, For LED, CCTV, Car, and more Hanvex 2.1mm x 5.5mm DC Power Supply Extension Cord, Male to Female Cable Specs - 100ft, 20AWG, UL 2468 (UL Component) Connectors - Female: 2.1mm x 5.5mm jack. Male: 2.1mm x 5.5mm plug. 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.