Matrix MR 500 quartz, metronome, light and sound

The MR500 from Matrix is a quartz metronome with tempo selections from 40 to 208 BPM (Beats Per Minute). It can be used by musicians and students to accurately keep time for applications such as rehearsals, sight-reading, and more. The MR500 features an A=440 Hz reference tone to tune instruments in ensembles at the same pitch. The LED light and a generated tone alert you to the BPM tempo that is set. The generated tone can be turned off, and the LED light left on for quiet operation. A built-in 1/8" earphone output jack is also available to monitor tempos with standard headphones. Retail about $50.