The Cherub WCM330BK key wound metronome has a black plastic casing with a metal wheel and mechanism. It is tempo adjustable from 40-208 beats per minute. The bell can be set to ding every 2,3,4 or 6 beats. Plastic casing Wind up mechanisim Tempo adjustable from 40-208 beats per minute Bell every 2,3,4 or 6 beats Black gloss finish
