The Ibanez PU3 clip on chromatic tuner with LCD display. Ideal for for clipping on the headstock of guitar, ukulele and other instruments. Clear, easy to read display. Tuner turns on automatically when clipped onto the headstock and turns off automatically when removed. Tuning Range between A0 (27.50Hz) - C8 (4186Hz),Calibration : A4=440Hz. Includes battery (lithium CR2032).