The BOSS DB-30 metronome is perfect for music practice, with start/stop functionality and tempo adjustment. Warranty/instruction manual not included. - Model Name: DB-30 - Brand: BOSS - Function: Metronome - Color: Black - Battery Type: AA batteries - Operation Buttons: Start/Stop, Tempo/Value, Note/Pitch, Tap/Mute It hasn't been used much and has been stored away. Thank you for looking.