The PW-CT-15 NS Micro Soundhole Tuner from Planet Waves gives you quick access to fast and accurate chromatic tuning, while remaining inconspicuously hidden in your instrument’s soundhole via a elegant mounting clip. This handy tuner is a cinch to use, on account of its easy-to-read, multicolor display. The Planet Waves PW-CT-15 NS Micro Soundhole Tuner is amazing to to use with acoustic guitars, ukuleles, and many other acoustic instruments. You’ll want one for every acoustic instrument you own!