VTG Matrix Quartz Metronome MR-500 Battery Operated Earphone Jack

By Matrix Quartz Metronome True vintage. Color: black Model: MR-500 Serial No. 4147745 Made in Korea Requires a 9V battery Compact, folding metal stand. Has a plug in for an aux earphone. Flashing light mode. 3 level switch: Light - Off - Beat. Perfect to practice piano, guitar, keyboard, recorder, cello, banjo, violin, string instrument, etc.