Seiko DM-51 Metronome Black, Digital Metronome, 4 Step volume control, 30-250 beats per minute, Adjustable cycle emphasis: 0,1,2,3,4,5,6,7, Built-in speaker, Clock Display, Clip-on , for example, to the music stand, Colour: Black, Battery type: 1 x CR2032 (included)