TC Poly-Tune Clip-on tuner
For those of you who love clip-on tuners but want one that does a little bit more, the TC polytune clip-on is for you.
It features three modes: Poly tune, which lets you tune all 6 strings at once; Chromatic, which is the standard one note at a time tuner, and the super accurate strobe tuner. It’s very compact–about the same size as other clip-on tuners. It also re-orients its display according to how you position it on the instrument. It also has a capo and flat-tuning mode.