Designed specifically for Ukulele, The chromatic ukulele sound hole tuner remains perfectly concealed within the instrument's sound hole for discreet tuning. The non-marring universal mounting clip allows stress-free installation, while the highly sensitive piezo transducer senses vibrations directly from the soundboard for fast and accurate tuning response. The bright, full-color display allows easy viewing in any environment. D'addario electronic tuners are designed by musicians for musicians featuring intuitive features, easy to read display's, and exceptional tuning accuracy.