Highlights: 1. Mechanical metronome 2. Loud sound 3. Stable metronome 4. Robust structure Features: Tempos 0, 2, 3, 4, 6 Speed: 40~208bpm Weight: 550g Size: 130mm x 220mm x 130mm Color: Km-01: black, red, white, pink, light blue Km-01t: transparent purple, transparent white, transparent blue, transparent red, metal mechanical core, pure metal movement accurate beat with bell, stable, loud bell for beats 0, 2, 3, 4 and 6 easy operation tempo:40-208 bpm weight:550g size: 62 x 26.5 x 28.5 cm /carton quantity in one box: 10pcs other:retia outside, brightness, high-grade, stable, tower and beautiful shape colors:wide choice of colors. Paper box tempo:40-208 bpm weight:550g size: 62 x 26.5 x 28.5 cm /carton quantity in one box: 10pcs other:retia outside, brightness, high-grade, stable, tower and beautiful shape colors:wide choice of colors