Korg TMR50BK TMR-50 Tuner Metronome Recorder - Black Tuner, metronome, and recorder can be used simultaneously or independently Internal Mic and speaker make it easy to record and play back your performance Loop Play function lets you repeat a desired region of a recorded track High-quality linear PCM recording/playback - record up to 100 tracks (about 20 minutes) The Sound Out function produces a reference tone in a three-octave range from the built-in speaker