ammoon Metronomes, Transparent Mechanical Metronome with Bell for Guitar Piano Violin Drum , Control Your Speed

mechanical metronome provides beat type selection (0, 2, 3, 4, 6), and beat speed control (40-208 beats/min). No battery required, what you need to do is rotating knob clockwise to wind metronome. Metal movement ensures stable performance. Detachable cover to inner; sliding weight to adjust beat speed; pull rod to beat type. With transparent shell and metal internal structure, it not only a metronome, but also an ornament for your home. A reliable practice partner for music lovers who play guitar, piano, violin, drum, guzheng and more. Wonderful gift choice.