I bought this instead of the official Surface Pro charger because it was so much cheaper. Unfortunately, everything this charger is good for is confusing and frustrating. Whenever I've used my device with this charger, I've always had trackpad issues. Microsoft Store & Support didn't find any problems with my laptop (probably because they didn't look at it while it was connected to this charger). It took me over a month AND replaced 1 laptop to find out this charger was the problem. That's right, the problem persisted on the restored device. I'm not sure if I just got a bad device, but please be careful when buying third-party chargers for your Surface Pro. If possible, buy the official version from the Microsoft Store. That's probably too expensive for a charger for most people; In this case, try to tamper with what you received with the device.