D'Addario Nexxus Viola Rechargeable Tuner
The D'Addario Nexxus 360 Viola Tuner pairs a high-performance piezo pickup with a full-color LED display that rotates a full 360 degrees for the perfect viewing angle in any lighting condition. USB-C rechargeable for up to 24 hours of tuning per charge, its varnish-safe clamp attaches to any part of the shoulder with a frequency range of 415–465Hz optimized specifically for viola.