Charge your 5V DC Devices using a Laptop or Desktop USB (Universal Serial Bus) Port. The USB2TYPEH 3-foot USB (Universal Serial Bus) to Coaxial Barrel Plug cable enables you to power an external 5V DC device using an available USB (Universal Serial Bus) port. The USB (Universal Serial Bus) to Coax Barrel Plug cable is a perfect solution for mobile applications, eliminating the need to pack a wall adapter for charging 5V devices.