This is an old AKAI phrase recorder. I used it for things like transcribing guitar phrases. You can change the tempo, pitch, and sound quality of recorded phrases and loop them. I've done a basic functionality check, but I haven't been able to confirm all the features completely. Also, the power adapter is not the original, but I've been using this one to operate it. (The voltage is 1V lower than the original, but it works without any problems.) Thank you.