Sabine incorporates digital circuitry into the Zipbeat-600 Digital Metronome that assures perfect beat rate accuracy. The Zipbeat's loud, clear tone makes practicing easy with any musical instrument. Bright, multifunction display gives you visual beat cues and you can switch from 2 alternating LEDs to 8 LEDs that sweep back and forth. Includes a built-in pitch pipe, earphone, and 9V battery.