I thought I picked the right one but it lasted the whole 10 minutes without any rough play. Maybe some buyers think it's ok, but it sounds like crap. A video posted by another buyer shows how it sounds after a few minutes of use. It's like the speaker exploded. Or the buttons are swapped. It's a horrible fuzzy sound instead of a single note. I know it's wrong because it sounded ok at first. Forget other tools. I had higher expectations and thought it would last more than a few minutes. Very disappointed in this junk.