This quartz metronome is easy to use, compact and reliable.; It produces a loud click with a clave tone.; The volume level is good, however be aware that there is no volume control. Easy to use dial - with tempo markings Choice of LED light & sound or simply light only Flip out metal stand A440 Hz tone generator Tempo Range: 40-208 Earphone jack Battery Operated: 9V (not included) Dimensions: 2.5" x 3.75" x 1.25"