The USB2TYPEM2M USB to Type M (5.5mm) Barrel cable enables you to power an external 5V DC device through an available USB port on your desktop or laptop computer. The USB to DC Plug cable offers the perfect solution for mobile applications, eliminating the need to carry/pack a wall adapter for charging 5V devices. Features: 1x USB `A' male connector 1x Type M barrel connector Molded connectors with strain relief Aluminum-Mylar Foil with Braided Shielding Durable PVC construction