Features: Universal Mechanical Metronome: This universal mechanical metronome is suitable for most musical instruments such as guitar bass piano violin drums saxophone etc. Great Assistant for Musical Instrument Practice: Features high and accurate rhythm clear and melodious sound won t mix with the sound of musical instrument the metronome is helpful for beginners to improve sense of beat and tempo. Easy to Use: Remove the cover and wind it up first then select your desired beat(2/3/4/6/0) and tempo(40-208 bpm) finally set the pendulum in motion. You can slide up or down the weight on the pendulum rod to adjust the speed according to the meter plate. Eco-friendly Mechanical Energy: No battery or extra power is needed; adopts a winding mechanism for power to produce metrical beats. Compact and Classic Design: Compact size lightweight and easy to carry; classic pyramid shape design durable ABS body with exquisite workmanship. Specifications: Brand: ammoon Color: Silver/ Yellowish Brown/ Reddish Brown/ Black(optional) Material: ABS + Metal Beats: 2/3/4/6/0 Tempo: 40-208 bpm Item Size: 11.6 * 11.6 * 25cm/ 4.6 * 4.6 * 9.8in Item Weight: 455g/ 16oz Package Size: 25.5 * 13.5 * 12.5cm/ 10 * 5.3 * 4.9in Package Weight: 575g/ 20.3oz Package List: 1 * Metronome 1 * Users Manual(English & French & German & Italian & Spanish & Japanese)