The YAMAHA TDM-700 is a compact instrument accessory with tuning and metronome functions. - Model Name: TDM-700 - Brand: YAMAHA - Functions: Tuner, Metronome - Volume Control: Volume adjustment function - Input Terminals: INPUT terminal - Headphone Terminals: PHONES terminal I have used it for about two years. However, since it was not used within a brass band club, there are no noticeable scratches. Thank you for viewing.