No separate power supply is needed. These elegant portable drives are simple to use, light and easy to carry, and require no power adapter -- they are powered directly through the USB cable.* Works with Windows and Mac. Synchronize files between home and office and encrypt everything on the drive for added security.Sleek and colorfulThis beautiful portable drive, available in eleven eye-catching colors, is light and easy to carry and fits smoothly in your hand or pocket. USB poweredPowered directly from the USB port on your PC.