The Korg CA- 2 Guitar/Instrument Chromatic Tuner offers quick and precise tuning, in a stylish, compact, hand-held unit. A clear display screen features a needle-style meter with large high-visibility note name and string name for pitch accuracy. The CA-2 is equipped with a wide pitch range, and accommodates a variety of instruments. An adjustable calibration of 410-480Hz offers a wide range of concert pitches, and a sound mode emits a reference tone from the built-in speaker for easy usability. Players can benefit from up to 200 hours of continuous usage with two AAA alkaline batteries.