KFDtech30W US Power Adapter Wall Travel Charger for Microsoft Surface Pro 3/Pro 4, Microsoft Windows 8.1 Pro 12-inch Tablet Power Supply Adapter Cord 36W Pro 3/Pro 4 Wall Charger Microsoft PSU KFD products are CE / FCC / RoHS certified, tested by the manufacturer to match and / or exceed the OEM specifications Warranty: 30 Days Money Back Guarantee/12 Months - Free Exchange Input: 100-240V 50-60Hz Output:12V 2.58A 30W Connector size:See picture-- Please confirm the specifications and plug size before purchasing!If you can't make sure,pls feel free to contact us Compatibility:Microsoft Windows Surface Pro 3 Tablet/Microsoft pro4,Microsoft surface pro4 Products trademarked KFD are marketed and sold exclusively by KFD+ Serial number is 86629087