Our digital Exercise Metronome provides a rythymic cadence that produces a steady pulse (or beat) that helps you maintain an established tempo during exercises. The Digital Metronome is capable of playing beats from 30 to 250 Beats Per Minute (BPM). Provides an auditorial an/or visual beat for a steady tempo while exercising. Size is 2.25” x 4”. Requires 2 - AAA batteries - included.