With its bright color display, flexible player orientation, and four tuning modes, the TU-02 enables reliable tuning of guitar, bass, ukulele, and other stringed instruments. The TU-02's color display offers high contrast for accurate, easy-to-read tuning anywhere. With its sturdy, padded clip, the tuner sits firmly and securely on your instrument's headstock. Plus, you can rotate the display to perfectly align it with your line of sight. A single C2032 lithium battery can power the TU-02 for up to 24 hours. The automatic power-off function ensures energy-saving operation when not in use.