About this item Compatibility: The 65W Charger works with a variety of Surface devices, including Surface Pro X, 8, 7, 6, 5, 4, 3, Surface Laptop 4, 3, 2, 1, Surface Book, and Surface Go. It fits models 1706, 1866, 1796, 1724, 1625, 1867, 1735, etc. Input & Output Specifications: Input: 100-240V 50/60Hz, making it suitable for worldwide use. Output: 15V-4A 65W, providing reliable power for your Surface device. Additional USB Port: The charger includes a 5V-1A 5W USB port, allowing you to charge another device, such as your phone, simultaneously. Safety Features: Designed with automatic thermal control, overload cut-off, and short circuit protection, this charger ensures safe and secure operation during use. Dimensions: 3.52 x 1.8 x 1 inches.