1. Widely Compatible: Compatible with Surface Laptop 3/ Laptop 2/ Laptop 1, Surface Pro 8, Surface Pro 7, Surface Pro 6, Surface Pro 5(2017), Surface Pro 4, Surface Pro 3,Surface Go/ Go 2,Surface Book/ Book 2. 2. Safety Certified : Made with the highest quality materials, Integrated chip technology provides over-voltage / short circuit/ overload/ heat protection system. Has CE, UL, FCC and ROHS certified. 3. Specifications: Input: AC 100~240V , Output:15V-4A 65W, With USB Charging Port: Additional USB 2.0 charging port of 5V / 1A. You can charge another device such as a phone at the same time, very convenient for travel, home, office to use. 4.High quality materials: Built-in IC chip technology provides overload / short circuit protection / overload protection / heat protection. We test each charger to ensure a tight, strong magnetic connection. We have also sourced a very high-quality material to ensure our power adapter ends will never come loose and its wires will stay intact and remain safe from fraying, even after numerous bends and laptop charging sessions!