The Leon LT33 tuner attaches to the head of the instrument through a clip. Allows 360º rotation. Display in white and green light, which signals when the note is tuned. Prepared for guitar (G), bass (B), violin or mandolin (V), ukulele (U) or chromatic (C). Captures frequencies from A0 (27.5Hz) to C8 (4186.00Hz). Base A4 (440Hz). works with CR2032 battery.