Our clip-on tuners, including the Micro Tuners, Eclipse Tuners, Equinox Tuners, and Nexxus Tuners, pick up notes by vibration using a piezo system. They do not pick up sound. For that reason, the tuner must be clipped onto your instrument for the tuner to register notes when you pluck a string.
If your tuner is not picking up notes when you pluck a string with the tuner clipped onto your instrument, please contact our support team for assistance.