musical instrument: Mechanical MetronomClassic Metal Clock MechanismTraditional Metronome Mode40-208 Beat/MinSpeed Tolerance<1%No BatteryColor:Black,Red,White,Purple,Teak,Yellow, Package:Carton Pcs/ctn: 10 G.W./Ctn Size(cm): 62x26.5x28.5Volume (CBM): 0.047Enjoy the most beautiful music,the most true music sounds.

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