Joyo JT12C digital instrument tuner,

clip-on, picks up vibrations directly, for banjo, ukulele, violin, mandolin, guitar,  and related instruments, this is an accurate chromatic auto tuner.

It's easy to read and acts like a tuning meter with a back light which illuminates the display panel. Tunes without interference from ambient noise, turns from red
to green when in tune.

CR20232 Battery included.