Compact and easy to use, the Seiko SQ50V features two sound options and a red LED beat indicator. Rotating dial speed selector. Tempo range from 40-208 bpm, generates A440 and Bb466 tuning pitches. Includes volume control, built-in stand, and 1/8" earphone jack. Requires one 9V battery (included). Size 67(W) x 95(H) x 32(D) mm.