With its versatile modes and practical design, you can tune a wide variety of instruments with the TU-02. Choose between standard tuning modes for guitar, 4- and 5-string basses and ukulele, or chromatic mode for alternative tunings and other stringed instruments. Compatibility with apartment tuning with a range of two semitones down, perfect for musicians who like to tune down for a heavier sound. And with adjustable calibration from 430 to 450 Hz, you can set the tuner to a reference other than the standard 440 Hz preset.