RocFly Magnetic US Plug Power Supply AC Adapter Cord for Microsoft Surface Pro 3/PRO 4 Intel Core i5 i7 Tablet 12V 2.58A (Pro 3 Adapter Without Usb) Made for Microsoft Surface Pro 3 12" Tablet Easy to fit and remove Easy to carry, ideal for travelling Electromagnetic immunity and high charging speed Power: Input 110V-220V/ 50-60Hz Output:12V 2.58A