A. A universal mechanical metronome suitable for most musical instruments, such as guitar, bass, piano, violin, drums, etc. B. The rhythm is accurate, the sound is clear and loud, which can help improve the sense of beat and rhythm, suitable for beginners of musical instruments. C. Easy to use: first wind up, then select the speed you want, and finally remove the cover to let the pendulum move. You can slide the weight on the pendulum up and down to adjust the speed according to the dashboard. D. Environmentally friendly mechanical energy, no battery or additional power source is needed; the winding mechanism is used to generate power. E. Traditional pyramid design with a protective cover, the body is sturdy, exquisite workmanship, portable and safe. F. colour: teak color G. Material: wood H. Package Contents: 1 x Mechanical Metronome Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.