Danelectro SN-1 Snark Tuner/Metronome Guitar/Bass Clip-on chromatic tuner for guitar with metronome, flat tuning/transpose feature, full color display, rotates 360 degrees for easy viewing, Tuner can be clipped on the front or back of the head stock, Tap Tempo Metronome, Pitch calibration 415-466Hz, high sensitivity vibration sensor, Batterie included