?About us Service?30 Days return refund and 12 months warranty replacement service;welcome to contact us through the order and support 24 x 7 email. ?Fast Charging and Convenient?65W Power supply quickly recharges the battery for your laptop, the USB port allows you to charger another device such as your phone at the same time. Don't worry about missing important message on your phone. ?Compatible with Surface Models?Surface Laptop 1,Surface Laptop 2,Surface Laptop 3,Surface Laptop 4;Surface Go 1,Surface Go 2;also fit with model 1796 and model 1625 1736 1706 Microsoft Surface Pro Charger. ?Compatible with Microsoft Models?Microsoft Surface pro 3,Surface pro 8,Surface pro 7,Surface pro 6,Surface pro 5,Surface pro 4,Surface pro X; Surface Book 2,Surface Book 1 Microsoft Surface Charger. ?Compatibility Performance?Model: MU65W-A1706; Input(AC): 100-240V 50/60 Hz; Output(DC): 15V- 4A 65W; USB Port: 5V-1A 5W USB 2.0(for cell Phones);And also compatible with Microsoft Surface pro 44W 15V-2.58A and 36W 12V-2.58A.