Practice tool to produce regular, metrical beat to help you play rhythms accurately. Improve your sense of beat and tempo. Features: The mechanical metronome uses a winding mechanism for power to produce metrical beat. Produce a clear and loud sound for use when practicing piano, violin, guitar, bass, drums and other musical instruments. The pendulum offers great visual tempo cues which makes it for beginners learning difficult passages. High retardant steel movement, corrosion resistance, oxidation resistance, long-term use without calibration. Clockwork adopt aviation grade spring steel, after ten thousand times the test, non-elastic changes, resistance to metal fatigue. Specifications: Color: black, blue, pink (optional) Case material: ABS Tempo: 40-208bps Beat: 0,2,3,4,6 Item size: 203 * 105 * 100mm / 8.0 * 4.1 * 3.9in Item weight: 470g / 1.0lb Package size: 240 * 130 * 130mm / 9.4 * 5.1 * 5.1in Package weight: 585g / 1.3lb Packing List: 1 * Metronome 1 * User Manual