The usb2typen1m usb to type n 55mm power cable enables you to power an external 5v dc device using an available usb port on your desktop or laptop computer the usb to dc plug cable is a perfect solution for mobile applications eliminating the need to pack a wall adapter for charging 5v devices eliminates having to carrystore a power adapter by enabling you to connect devices from a usb port to a dc plug backed by startechcom lifetime warranty convert a usb a port into a type n power connector