Mechanical Metronome High Precision Universal Piano Metronome for Guitar Violin Drums and Other Musical Instruments White Item Type: Mechanical MetronomeMaterial: ABS+ metalMethod:(1) Clockwise curtain slowly tighten the spring until mechanical resistance is felt; (2) Move the weight slider on the pendulum rod to adjust the metronome speed, and the degree corresponding to the upper edge of the weight block is the set speed; (3) Adjust the selection rod of the beat, select the beat; (4) Pull out the pendulum rod and lean slightly to the left or right. Precautions: (1) Place the metronome on a horizontal surface; (2) If the pendulum rod is not vertical when it stops, do not force it to return to the middle position, please wind up a little more, and then start; (3) After the metronome is used, please put the pendulum rod back on the top hook and close the lid; (4) Do not use or place the metronome in wet or dusty places, so as not to affect the function; (5) When cleaning the metronome, please use a dry, soft cloth to clean, do not use volatile chemicals, so as not to damage the metronome; (6) Do not disassemble metronome components, such as weight sliders, pendulum rods, etc.