Features: 1.Easily play your favorite music! - This mechanical metronome helps you develop and maintain your rhythm, play accurately and enhance your musical awareness. 2.Applies to most musical instruments - When practicing piano, violin, guitar, bass, drums and other instruments, make more accurate rhythms . 3.Incredible features - sound clicks and ring tones to maintain rhythm while reading music sheets; winding mechanism produces beat, no battery required; speed range: 40-208 bpm; beat selection: 0, 2, 3, 4 , 6. 4.It is easy to use even for children and beginners - remove the brakes, pull down the lid, adjust the beat and rhythm, and then use it; average single full wind (2160 clicks) lasts at least 18 minutes, depending on the rhythm; 5.Classic bullet style, plastic black or white case , with bells. specification: Easily play your favorite music! - This mechanical metronome helps you develop and maintain your rhythm, play accurately and enhance your musical awareness. Applies to most musical instruments - When practicing piano, violin, guitar, bass, drums and other instruments, make more accurate rhythms. Incredible features - sound clicks and ring tones to maintain rhythm while reading music sheets; winding mechanism produces beat, no battery required; speed range: 40-208 bpm; beat selection: 0, 2, 3, 4 , 6. It is easy to use even for children and beginners - remove the brakes, pull down the lid, adjust the beat and rhythm, and then use it; average single full wind (2160 clicks) lasts at least 18 minutes, depending on the rhythm; Classic bullet style, plastic black or white case , with bells. : Color:Black/White(Optional) Speed Range:40~208bmp Beat Selection:0,2,3,4,6 Package List: 1 x Mechanical Metronome 1 x Users Manual