Charge your 5V DC devices from your computer through a USB (Universal Serial Bus) 2.0 port. The USB2TYPEM2M USB (Universal Serial Bus) to Type M (5.5mm) Barrel cable enables you to power an external 5V DC device through an available USB (Universal Serial Bus) port on your desktop or laptop computer. The USB (Universal Serial Bus) to DC Plug cable offers the perfect solution for mobile applications, eliminating the need to carry/pack a wall adapter for charging 5V devices.