PORTABLE, CLIP-ON DESIGN: This digital metronome with clip and lanyard hole design, easy and convenient to carry and fix. Multi-functional mini metronome, portable, clip-on design, easily fixed. WITH TAP FUNCTION: This digital beat tempo with tap function enables you to test your ideal tempo or tempo of a track. MULTI-FUNCTIONAL 3.5MM JACK: The clip-on metronome product is designed with 3.5mm channel headphone jack. Multi-functional, can be used for all types of instruments. ADJUSTABLE VOLUME CONTROL: This mini metronome with adjustable volume control: Max/medium/min/mute. Widely suitable for musican instruments. MARK TIME: Use this M50 metronome to mark time by the means of regularly recurring ticks or flashes at adjustable intervals. It is multi-functional, very easy to use.