?[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, Microsoft Surface Go 3 2 1, Surface Laptop 4 3 2 1, Surface Book.?[Charging Only] This USB C to surface cable support charging surface devices only, cannot transfer data. ?[NOTE 1] You need a USB-C adapter that supports 15V 3A output. Pls confirm before placing order. ?[Exquisite Workmanship] Strict quality inspection standards, fine appearance details, refuse to be shoddy. Knowledge That Only Experts Know: The USB-C contact shrapnel is made of high-elastic, high-conductivity copper. After 10000 times plug & unplug test, the shrapnel contact resistance is still less than 15mO, this is very important for this cable. ?[PD Intelligent Guidance Technology] Built-in smart PD source control chip, output voltage 15V, you can use a universal USB C PD charger adapter to charge your Microsoft Surface Pro/Go. ?[UPGRADE] After plugging the Type-C male end into the charger adapter, if the LED light is on, it means that the handshake between the induction chip and the charger protocol chip is successful and can work normally.