The Microsoft 24W Surface Power Supply replenishes the battery of your tablet, keeping it up and running at maximum efficiency. The ultra-slim design makes it easily portable and able to fit into small spaces, such as in a carrying case. This Microsoft Surface power cable also attaches magnetically to your tablet, making it easy to keep track of and providing a constant source of power so you can use your Surface just about anywhere. Power up your Surface RT anywhere with the magnetic power supply for Surface & Surface 2. Ultra-Trim Design/ Magnetically Clicks/ 24W AC Wattage/ PSU Has Folding AC Prongs Form Factor/ Exclusively For Charging Surface And Surface 2.With a built-in USB port, the Microsoft Surface 24W Power Supply lets you charge another USB-enabled device simultaneously.This power supply is made exclusively for the Surface Go only.