Boss Dr. Beat DB66 is the workhorse of the Dr. Beat Series. From straight 4/4 to complex polyrhythms, the DB-66 will guide users through any practice session.
The unit features four (4) sliders balanced between different pitched chimes for quarter notes, eighth note afterbeats, sixteenth-note afterbeats and eighth-note triplets. It can be set for up to 6 beats per measures and has a "Tap" function for setting the tempo by tapping a key on the DB-66. Also features a A-440 tone for acoustic tuning.