This AC adapter is perfect for powering your Microsoft Surface Pro 3 or 4. It is designed for use with laptops and is compatible with the Microsoft Surface brand. The adapter has a standard voltage of 12V and comes in a sleek black color. In addition, this adapter is compliant with California Prop 65 Warning standards, ensuring that you can use it with peace of mind. With a unit quantity of 1, this adapter is a great choice for anyone who needs a replacement or an extra charger for their Microsoft Surface Surface Pro 3 or 4.