Check the listing for details. Mini Mechanical Metronome Professional for Piano Guitar,Red. Condition: New. Listed at 19.04 USD. What is this?Our mechanical metronome allows you to better grasp the beat or rhythm in the process of learning a musical instrument. It is perfect for beginners and instrument players who want to improve their performance. The metronome is a universal metronome for piano, guitar, violin, drums and other instruments.What will I get?Mini mechanical metronomeSize: 110mm x 54mm x 37mm/4.3inch x 2.1inch/1.5inch(LxWxH)Beat Range: 40-208 beat per minuteColor: RedIn the package of:1x Piano metronomeAre there any advantages of the product?Metronome body is made of ABS plastic, and the movement is made of metal, which is durable and will not rust or corrode. It keeps the beat accurate for a long time and provides a firm sense of rhythm. It is a musical instrument accessory especially for beginners.