D'Addario NS Micro Sound Hole Tuner for Guitar and Ukulele PW-CT-15The D'Addario NS Micro Soundhole Tuner is designed to fit seamlessly within the soundholes of acoustic guitars, ukuleles, and other acoustic instruments. Specifically designed to stay concealed within the instruments soundhole the NS Micro Soundhole Tuner is visible only to the player. Equipped with a non marring plastic mounting clip the tuner provides fast and accurate chromatic tuning from a highly sensitive piezo transducer, and features an easy