Package Contents:1x 127W Surface Charger, 1x AC Cord with in 30 days of purchase, we offer a no-questions-aske replacement or full refund guarantee, 365 Days Warranty Guaranteed by the Manufacturer. Power supply designed provides optimal charging efficiency and save more time.It has a USB charging port ( 5V 1A 5W)on the charging brick jus like original Microsoft surface charger, offering decent output to charge a smart phones. 127W Watt Surface Book charger can quickly charge compatible laptop. The intelligent control chip inside the power charger provides current protection, short circuit protection, voltage protection, temperature control, fire protection, and grounding protection. and the USB port allows you to charge another device such as your phone at the same time. Surface Book 3 Charger Input: 100-240v~1.92A, 50/60Hz ; Output:15V--8A, 5V--1.5A 127W; With Additional USB Port 5V 1.5A USB 2.0, Compatible with 15V-2.58A 44W, 12V-2.58A 36W, 15V-1.6A 24W 15V-4A 65W 15V 6.33A 102W. Surface 127W Power Supply Compatible with Microsoft Surface Book 3, Surface Book 2, Surface Book (1st Gen), Surface Laptop 3, Surface Laptop 2, Surface Laptop (1st Gen), Surface Pro X, Surface Pro 9 Surface Pro 8 Surface Pro 7, Surface Pro 6, Surface Pro (5th Gen), Surface Pro 4, Surface Pro 3, Surface Go 4 3 2, Surface Go (1st Gen) Surface Laptop Go, Surface Laptop Studio 2, Surface Tablet Model: 1703 1796 1706 1873 1735 1724 1631 1782 1769 1736 1800 1625.