D'Addario Planet Waves Micro Soundhole Tuner
Designed specifically for acoustic guitar, ukulele, and other acoustic instruments, the chromatic Micro Soundhole Tuner remains perfectly concealed within the instrument's soundhole 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, multi-color display allows easy viewing in any environment. A435-455 calibration range, uses one 3V 2032 battery (note: this tuner does not utilize a battery cover).