Cecilio MM-CBlue Traditional Wind Up Mechanical Pyramid Shape Pendulum Metronome with Bell Color: Solid clear blue with clear cover Tempo Range: Grave 40 bpm to Prestissimo 208 bpm, Clockwork motor with click Downbeat bell: off, 2, 3, 4, or 6 beats Wind up switch, No batteries required Dimension: 5" x 5.5" x 9.5"