The usb2typem 3 feet usb to coaxial barrel plug cable enables you to power an external 5v dc device by using an available usb port features molded connectors with strain relief cable colour black cable length 091 m connector type connector a 1 x usb a male connector b 1 x type m barrel plug description the usb to coax barrel plug cable is a perfect solution for mobile applications eliminating the need to pack a wall adaptor for charging 5v devices form factor usb cable marketing