Mechanical Metronome Guitar Violin Guzheng Musical Instrument Universal Piano Metronome Beat RhythmPLAY YOUR FAVORITE PIECES WITH EASEThis mechanical metronome helps you develop rhythm, maintain tempo, play accurately and increase your musical awareness.APPLICABLE FOR MOST MUSIC INSTRUMENTSProduce rhythms at a proper pace when practicing piano, violin, guitar, bass, drum and other musical instruments.INCREDIBLE FEATURESAudible click & bell ring to maintain the rhythm while reading music sheet; Wind up mechanism produce metrical beats, no battery required; Tempo range: 40-208 bpm; Beat selection:0,2,3,4,6.EASY TO USE EVEN FOR CHILDREN & BEGINNERSTake out the brake, pull off the cover, adjust the beat and tempo, and then you are ready to use; An average single full wind (2160 clicks) lasts at least 18 minutes depending on the tempo;