harger Input: AC 100-240V Output: 15V 2.58A 44W. USB Port: 5V 1A USB 2.0. 44W Power supply quickly recharges the battery and the USB port allows you to charge another device such as your phone at the same time. COMPATIBILITY;44w Surface charger designed to match your Microsoft Surface Pro,Surface Laptop,Surface Laptop 2,Surface Laptop 3,Surface Pro X, Surface Pro 7,Surface Pro 6,Surface Pro 4,Surface Pro 3,Surface Go & Surface Book. with a Power Cord Compatible with 24W/ 36W power supply charger Each charger undergoes rigorous performance testing. Don't risk blowing out your battery, or setting your desk on fire, or even just being disappointed with a cheap product - Go for the best! Keep your computer safe and fully charged with.surface pro charger manufactured with the highest quality materials and include multiple smart features safeguarding against over current,over voltage,over load,short-circuit protection and auto recovery,certificated with UL/CE/FCC/RoHS standard.