A metronome is a device that produces an audible beat at regular intervals.
You can choose between these beat rates:
Grave: 20 beats per minute.
Largo: 50 beats per minute.
Lento: 70 beats per minute.
Andante: 94 beats per minute.
Moderato: 114 beats per minute.
Allegretto: 144 beats per minute.
Presto: 184 beats per minute.
Prestissimo : 204 beats per minute.