Designed for Microsoft Surface Pro 3 Surface Pro 4 i5 i7 Surface Pro 5 2017 Pro 6 Surface Laptop Surface Go & Surface Book Input : DC 12-24V; Output: DC 12V/2.58A ; USB Port: 5V 2.1A , (USB 2.0) 42W Surface Pro car charger quickly recharges the battery and the USB port allows you to charge another device such as your phone at the same time