Features: Unique mini mechanical metronome design, only 11cm height, pocket size, very portable.  The metronome adopts durable high-elastic nylon movement, which ensures a more stable working state, avoiding the shortcomings that ordinary metronomes are not accurate when once dropped.  Its sound is soft, not harsh at all. Without bell ringing.  It has a wind up mechanism and a swinging pendulum and is enclosed in a high-impact plastic case.  Metronome can help you train your concept on music speed, make your instrumental performance more complete and smooth, and make the rhythm more even.   Operating Instruction: (1)TO START: Wind up the winding key in the direction of the arrow mark and push the pendulum leftward.  (2)TO SET TEMPO: Move the sliding weight up and down and set its upper end on the dial.  (3)AFTER USING: Slide the weight to the middle or upper part of the pendulum and put on the cover.   Specifications: Model: JX-V;  Color: White, Black, Red, Mahogany, Light mahogany (Optional);  Material: Plastic and metal;  Suitability: For piano, guitar, violin, ukulele, Chinese zither and other music instruments;  Beats/per minute: 60~208/per minute;  Item Size: 5 * 3.1 * 11cm / 2 * 1.2 * 4.3in;  Item Weight: 154g / 5.4oz;  Package Size: 6 * 4 * 11.8cm / 2.4 * 1.6 * 4.6in;  Package Weight: 175g / 6.2oz;   Package List: 1 * Mini Mechanical Metronome