Fishman FT-2 Digital Chromatic Clip-On Tuner for Acoustic Guitar, Electric Guitar, Bass, Ukulele, Banjo, Mandolin, Violin, Cello, Viola, and Mandola Flip it up to turn it on, flip it down to turn it off Fully chromatic, automatically displays the note Large, easy to read LCD display lights green when in-tune, red for sharp, and amber for flat Meter-style needle display is accurate to +/-1 cent Built-in clip-on sensor & one 2032 coin battery included