⭕[UPGRADE] Since the USB-C PD charging protocol has only been released in recent years, some of the protocol chip compatibility poor charging adapter can not make our cable work normally (can not induce output 15V voltage), although we try to choose the most compatible chip, has achieved 100% compatibility with the original charger adapter of the famous brand, but after all, there is a situation that is incompatible with some unbranded charger adapters. For this reason, our upgraded version specially adds LED display, if it can induce output 15V voltage, the LED will be on, otherwise it will be off, which is convenient to determine the cause of the problem.⭕[IMPORTANT] There may be a usage problem: after connecting the charger adapter to the Surface, it does not charge. When there is a similar problem, please contact us immediately: Since this product involves the problem of matching the charger adapter, we are very professional and will guide you step by step.⭕[Functions] Use the universal USB-C PD charger adapter, connect with this cable, you can easily charge your surface device.⭕[Notice] There must be a PD charger with at least 45W supporting 15V/3A output.⭕[Compatibility] Microsoft Surface Pro 3 4 5 6 7 8 9 X, Microsoft Surface Go 3 2 1, Surface Laptop 4 3 2 1 Studio Go, Surface Book/Book 2.