Guitar Tuner, Clip On, Flat Tuning Function. Preset for Guitar, Bass, Violin, Ukulele Plus Chromatic. Acoustic or Electric. Best Digital Vibration Tuner for Every Level of Player. Easy tuning with the full color analog display. In the preset modes for guitar, bass, violin, ukulele the tuner displays the note and the string number. In the chromatic mode the tuner displays the note being played. Theoretically the tuner could be used for any instrument, mandolin, banjo, viola, cello, maybe even an autoharp. Visual heartbeat metronome - 30 to 250BPM Battery save feature. Powers off after 2 minutes of no use.