Clip-on digital metronome characterized by a clear, loud sound. - Brand: SEIKO - Model Name: DM51 - Tempo Range: 30-250 bpm - Size: 37(W) x 57(H) x 34(D) mm - Power: CR2032 x 1 - Accessories: Instruction manual The outer box is torn upon opening. Used once. The initial battery is still usable, but its lifespan is unknown. This item is currently sold on Amazon for approximately 1800 yen. Thank you for viewing.