Our Charger After-Sale ?Within 60 days of purchase, we offer a full money-back promise. We also will freely exchange the product or give you a refund if it becomes defective within a year purchase. If any questions about it, please feel free to ask in Q&A or email us through the store page. Practical ? Provide USB port 5V-1A 5W to charge your Android phones or iPhone at the same time. Premium material can bear Microsoft surface book charger cord bending for durability. Safety & Security First ? All Surface Pro Surface Laptop Chargers are passed CE FCC RoHS Certified. Made from durable, high quality materials and includes multiple smart features safeguarding against over-charging, over-power, over-current, discharge, over-voltage, high temperature, short-circuit, Electromagnetic wave.You can rest assured to use. Widely Compatibility ? Microsoft Surface Go/Go 2, Surface Pro X/7/6/5/4/3 , Surface Laptop 1/2/3, Surface Book/Book 2. Replacement for 24W/ 36W/ 44W power supply charger. Specification ? Input: 100-240V 50/60Hz; Output: 15V 4A 65W; USB port allows ( USB 2.0,USB Port 5V-1A 5W ).