Thank you for viewing! This is the YAMAHA TDM-700DMK, a compact device that combines tuner and metronome functions. I've used it a few times, but there are no noticeable scratches or stains. After use, I wrapped it in cushioning material and stored it. I checked the operation before listing, and confirmed that it works properly. - Brand: YAMAHA - Model: TDM-700DMK - Functions: Tuner, Metronome - Instruction Manual: Included