Boss TU-1000 Pro-Caliber Tuning for the Stage Floor Ultra-smooth, accurate motion and superior visibility with the meters oversized LED Accu-Pitch uses the motion of the meters lights to show when tuning is complete Two display modes: Cent (LED functions like a needle-type meter) and Stream (fluid light motion indicates when notes are out of tune) Powering up the tuner automatically mutes the output signal, allowing you to tune without outputting sound Handles open tunings, DADGAD, and other alternate tunings, as well as dropped tunings up to six semitones below standard