Are you a musician? When practicing music it is important to maintain a constant tempo. By adjusting the metronome, facility can be achieved at varying tempi. Adjust the tempo (beats per minute) from 1 to 210. The time signature may also be adjusted, at 2/4, 3/4, and 4/4. This metronome also has a speed scale that may be turned on and off.
Why carry a large metronome when you can have it on your iPhone or iPod for a fraction of the price!