... Metronome 2. Loud sound 3. Stable Metronome 4. Robust structure Piano Music Mechanical MetronomeMetal mechanical core,pure metal movement · Accurate beat with ... bell,stable, loud · Bell for beats 0,2,3,4 and 6 · Easy operation ·Tempo ... use it to exercise the sense of rhythm in learning piano, wind instruments, etc.Purchase Reasons ·Appearance is following the ...