DIGITAL / MECHANICAL HYBRID- Unique design, easy to use. Powered by 3 AAA batteries (included), makes a beeping sound for tempo. Looks like a traditional mechanical metronome, but has more functions..MULTI-FUNCTIONAL- Slide front knob up and down to adjust electronic tempo or variable pitch. Use side knobs to adjust beats and rhythms..6 BEAT OPTIONS: 0,2,3,4,5,6 beats. Tones for accented beat (chime), weak beat (drum), and rhythm (wood block)..7 RHYTHM PATTERNS: Duplets, triplets, quadruplets, triplets and quadruplets with inner beats omitted..PLEASE NOTE: The pendulum does not swing back and forth like a traditional metronome. Front knob slides up and down to adjust electronic tempo or variable pitch.