disappointed i got a lemon [SEP] opened it and set it up and it has basically zero power thought maybe it needed charged or something before using but still not working any better after leaving it plugged in for a bit and besides the description specifically states it doesn t require charging assuming this is not the way it s supposed to be based on all the good reviews the speed adjuster has one speed ridiculously slow regardless of what direction and what speed it s moving slower than i could with my handso much slower it s not even moving fast enough to make a mark in my nail polish removal bummed because the reviews sounded great for this despite the cheaper price guess i got a lemon will go back to using my older file until i return this one and find a better replacement