The TC Electronic PolyTune Mini may be one of my favorite new products from NAMM so far:
We introduced polyphonic tuning to the world and since then guitarists everywhere have welcomed this next-generation way of tuning with open arms. PolyTune® Mini is the world’s smallest polyphonic tuner and it will fit on any pedal board. Sometimes size actually does matter and in such cases, PolyTune Mini is the perfect solution as no other pedal tuner in the world will take up so little space, which means more room for other pedals.
PolyTune Mini shows you the tuning state of all strings simultaneously by simply strumming your guitar, allowing you to get back to playing in a matter of seconds. PolyTune Mini is among the most precise tuners in the world, tuning with +/- 0.5 cent precision in chromatic mode and +/- 1 cent accuracy in polyphonic mode. Also, it automatically switches between chromatic and polyphonic modes depending on whether you strum all strings at once or pick each string individually.
Further, PolyTune Mini features Drop-D and Capo modes as well as True Bypass for zero tone coloration and a super-bright LED display.
If it works as well as the full size PolyTune (and why wouldn’t it?), I think this may very well replace the Boss tuner that’s currently on my board.