Gender Changer: Not only can it be used to extend the DC power cable, but also for gender conversion of 5.5mm x 2.1mm DC connector or socket. Convert existing DC 5.5mm x 2.1mm male power cables to DC 5.5mm x 2.1mm female power cables, use this coupler to connect two cables without cutting or splicing wires. Plug and play: Compact design for portability, easy to use and install High quality: Rust and corrosion protection performance can extend the life of the adapter, inner copper connection, high temperature resistant plastic outer shell, the contour of the shell makes it easy to insert and remove. Durability: PVC molded inner core, good conductivity, low resistance, strong current carrying capacity Compatible: Widely used in power cords for small appliances and electronic products. For example, surveillance cameras, media players, MP3/MP4 players, laptops, mobile phones, smartphones, car audio, etc.