Korg LCA 120 Focus Tune Chromatic Tuner with Large Backlit LCD Extra large backlit LCD for excellent visibility Focus Tune function allows for even more accurate tuning within +/-10 cents Sound Level meter visually indicates the volume of a performance Korg's own Sound Back mode lets you tune using a reference tone together with the meter (using the optional CM-100L contact microphone) Temperament Program function lets you specify the tuning pitch for each note