The Ex-Pro USB to DC cable allows you to power 5V DC devices from a single USB port. This is the perfect solution for mobile applications, and eliminated the need to pack a wall adapter for powering 5V devices. Please note: Please check to ensure the DC pin and polarity is correct for your device before you make your purchase as the DC plug size (this includes the inner pin) may vary. Specifications: Barrel: 5.5 * 2.
eBay