Feature:1. The back of the product has a clip and lanyard hole results designed to facilitate the fixed.2. Import sound unit, The beat sound is loud and the sound is nice.3. Adjustable volume control.4. Stereo earphone jack is available.5. Tap function enables you to test your ideal tempo or tempo of a track.6. Multi-functional and professional mini metronome is lightweight and portable, easy to use.Specification:The product has a percussion rhythm speed function: TAP function, can accurately test your own heart beat speed or a song beat speed, has two-channel headphone output.Features:The back of the product has a clip and lanyard hole results designed to facilitate the fixed.Import sound unit, The beat sound is loud and the sound is nice.Adjustable volume control.Stereo earphone jack is available.Tap function enables you to test your ideal tempo or tempo of a track.Multi-functional and professional mini metronome is lightweight and portable, easy to use.Specifications:Color: yellow, blue, red, white, black (optional)Speed range: 30-280bpmThe beat changes: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9Accuracy: plus or minus 0.001 (thousandth)Volume adjustment: maximum volume, medium volume, minimum volume, muteBattery: 1 * CR2032, 3V, 240mAh (not included)Item size: 130 * 56 * 32mm / 5.1 * 2.2 * 1.3inItem weight: 23g / 0.8ouncePackage size:130 * 80 * 40mm / 5.1 * 3.1 * 1.6inPackage weight: 33g / 1.2ouncePackage list:1 * Metronome1 * User ManualPackage List:1 * Metronome1 * User Manual