The KDM2 is an excellent metronome, providing both audible and visual tempo cues. The tempo can be set manually or with the Tap Tempo function. An audio tone (C4 - B4) is provided as a tuning reference. The large custom LCD provides excellent visibility.,In addition to a straight count, 19 beat patterns are conveniently provided. Three PCM sounds - Cowbell, Clave, Agogo bell - let you define an easy-to-hear sound based on the musical setting. The cylindrical resonator (a Korg exclusive) provides a powerful, well defined tone - or listen privately through a headphone. The top-mounted Start/Stop switch houses dual-color LEDs to provide beat and downbeat indicators. Four AAA alkaline batteries provide 120 hours of continuous use at 120 BPM. Type: Musical Instrument Accessories Features: Korg's original, cylindrical resonator speaker provides powerful sound, now with even more volume and improved tone. An LED provides visual confirmation of the tempo, a convenient feature for practicing with the metronome muted. Newly added beat variations range from basic to sophisticated rhythms like son clave and rumba clave A total of 19 Specifications: Metronome Mode: Tempo Range: Quarter note = 30 to 252 bpm PENDULUM step, 30 to 250 bpm FULL step beats/minute Tempo Setting: PENDULUM step/FULL step Beat Range: 0 to 9 beats, duplets, triplets, triplet with inner beat omitted, quadruplets, quadruplets with inner beats omitted, son clave (2-3) (3-2), rumba clave (2-3) (3-2) Sound Out Height: 4.19" Width: 4.17" Depth: 1.91"