.* Made of high quality material for durable use. Universal Mechanical Metronome: This universal mechanical metronome is suitable for most musical instruments, such as guitar, bass, piano, violin, drum, etc. Easy to use: first roll up, then select the desired rhythm (2/3/4/6/0) and tempo(40-208 bpm), finally remove the cover and set the pendulum in motion. You can move the weight up or down on the pendulum bar to adjust the speed according to the gauge plate. Green mechanical energy: no battery or additional power is needed; It adopts winding mechanism for power to produce symmetrical strokes. Product Parameters:Color: BlackMaterial: ABS + MetalBeats: 2/3/4/6/0Tempo: 40-208 bpmProduct Size: 9.5*12*20.5cm/ 3.7*4.7*8.1in (Approx.)Product Weight: 430g/ 15.2oz (Approx.)Package List:Mechanical Metronome x 1User Manual (English) x 1Note:Please pull out the brake at the bottom before using the metronome. Please refer to the measurement. A small measurement error is acceptable within the normal range. There may be a slight color difference due to monitor, camera or other factors, please refer to the physical item.