In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The BOSS DB-88 Dr. Beat represents a new standard in professional electronic metronomes. Based on an advanced metronome design, the DB-88 memorizes tempo, beat and rhythm level settings and facilitates practicing in odd-time signatures through the combination of two distinct beats. Metronome functions are enhanced through audio voice count (one, two, three ...).