The most-accurate, most-flexible, easiest-to-use tuner ever! Displays in cents, hertz, or strobe, and features proprietary circuitry that locks right onto the root tone, ignoring harmonics that confuse cheaper tuners. 7-semitone dropped tunings (a worldwide first), reference pitches from the sound jack, and built-in mic for acoustic tuning provide a wealth of professional options. Tuning modes include chromatic, guitar (6- or 7-string), bass, and 5 types of open tuning. Calibration adjustable from 438-445Hz, select either manual or auto. Lights up rack equipment mounted below. Features: Locks right onto the root tone Automatically detects the note name Displays in cents, hertz, or strobe 438-455Hz calibration range Chromatic, guitar (6- or 7-string), bass, and 5 types of open tuning Reference pitches from the sound jack 12-note equal tempered Accurate to ±1 cent Lights up rack equipment mounted below Front panel input and mute Back panel input, output, and mute