Specification: Charge Your 5V DC Devices From Your Computer Through A USB Port The USB to DC (3.5mm) Power Cable enables you to power an external 5V DC device, using an available USB port on your desktop or laptop computer. Perfect Solution For Mobile Applications The USB to DC Plug cable is a perfect solution for mobile applications, eliminating the need to pack a wall adapter for charging 5V devices. This product eliminates having to carry/store a power adapter, by enabling you to connect devices from a USB port to a DC plug. Convert a USB A port into a DC power connector, for powering external drives or mobile peripherals through an available USB port on your desktop/laptop One USB A male connector One DC barrel power connector Molded connectors with strain relief Package Includes: 2 x USB to 3.5 mm/1.35 mm 5 Volt DC Barrel Jack Power Cable Warranty Policy: 45 days money-back and 12-month, worry-free Guarantee! If you have any problem about products or after-sales, please contact our staffs, they will sincerely service for you.