Had mine 2 months, used it twice, then no power, thought maybe the firmware needed update but when plugged in to the computer gave a short error and said device required more power than port could supply, RY8310 30V 1A 1.4MHz synchronous buck regulator is a known issue with these, found several when I googled no power. I could open it up and try to fix but it's only 2 months old, I loved it when it was working. Tried contacting the company but since I bought it on 麻豆区 doubtful of warranty, They say they only warranty ones bought on their site. Hence the 1 star for the amazon product, it's $125 in scrap at this point. If you want one buy it from their site and then if it does have an issue at least they will cover it.