About this item Input: 100-240V 50 / 60 Hz; Output:15V-2.58A 44W; USB Port: 5V-1A; replacement for Microsoft surface pro 4 charger, a good replacement ac adapter if your original power supply has run out of life. Fully Compatible: Microsoft Surface Pro 3, Surface Pro 4, Surface Pro 5, Surface Pro 6, Surface Pro 7, Surface Pro X, Surface Book, Surface Go and Surface Laptop 3 2 1; Microsoft Model 1800. Additional USB Port and 6ft Power Cord, The USB port allows you to charge another device such as your phone at the same time.