Supports chromatic tuning, plus 7-string guitars and 6-string basses. Accu-Pitch function sounds a tone when pitch is correct. Reference Tone Play function makes it easy to verify tuning by ear. Tunes down to 5 flats. Ultra-wide tuning range of E0 to C8—almost 8 octaves!. Ultra-thin body fits easily into a guitar case or pocket. Metronome has 7 rhythms, 10 beats and cool animated LCD display.