GPK Systems Ac Adapter for Microsoft Surface, Surface Pro 10.6 Windows 8 Tablet 12v Power Supply Adapter Cord Input: 100 - 240 V (worldwide use) Output: 19V 4.74, - Connector Size: Magnetic Service & Support 1 year warranty Products are CE/FCC/RoHS certified, tested by manufacturer to match and/or exceed specifications of OEM products. Designed exclusively for use with the laptops 100% compatibility with the original.