Used in BioAge & Aerobic Tests. Diminutive Body provides Clear and Loud Sounds. Clip-on Style Design. Tempo Range 30 to 250 Beats per Minute. Tempo indicator: Motion LED and Flashing Red LED. Beat Accents from 0 to 7. 3 Rhythm Accents Modes: 8th Note, Triplet and 16th Notes. 4-Level Volume Control Modes including Silent Mode. Memory Function that Saves your Settings. Digital Clock. User Friendly Menu and Buttons