Designed professionally to charge for Microsoft Surface Pro 6/5/4/3, Surface 3, Surface Laptop, Surface Laptop 2/Surface Studio/Surface Book 1/2/Surface Go. (NOTE 1: Charging speeds will vary depending on your device and wall charger. Please use USB-C PD Charger. NOTE 2: Charging to Surface Book 1/2 will be slower because the maximum current of the charging cable is 2.58A.)Charging Power Requirement45W or greater for Surface, with 15V output, which is the standard for most Microsoft Surfaces. (NOTE: 65W or greater for Surface Pro 6.)Premium MaterialsNew pure copper wires will not generate heat, which ensures charging safety. Built-in aluminum foil and shielding net to improve charging stability; Covered with PVC material, flexible and durable.