Feature: 1. The metronome is equipped with a speed adjustment slider, which can be moved up and down and refer to the left and right scales to adjust the speed of the beat. 2. The sound of the product is soft, not harsh at all without bell ringing, which can help to immerse you in playing. 3. Can fast help train the concept of music and make playing more full, and make the rhythm more smooth. 4. With durable copper gear movement, clockwork mechanism and swing pendulum, the metronome is encapsulated in a high‑impact plastic case, sturdy and durable with long service life. 5. The height is only 11cm with pocket size, which makes the metronome portable and easy to carry. Specification: Item Type: Mini Mechanical Metronome Material: Plastic + Metal Color: White Product Size: Approx. 11x5x3cm / 4.3x2x1.2in Package List: 1 xMini Mechanical Metronome 1 x English User Manual