EXTREME ACCURACY - The Micro Rechargeable Violin Tuner features an extremely accurate piezo transducer that picks up an instrument's vibration rather than sound. A wide calibration range (410-480Hz) guarantees precise performance. RECHARGEABLE TUNER - 22 hours of tuning time per charge (USB-C cable included). Auto power-off maximizes use time per charge FULL COLOR DISPLAY - Features an easy-to-read, multi-color display in an attractive compact design CLIP ON TUNER - A non-marring, lever-lock clamp holds the tuner securely to the instrument, while still allowing easy application and removal D’ADDARIO ACCESSORIES - For over 20 years, D’Addario Accessories (formerly Planet Waves) has been leading the industry in innovative and problem-solving products that serve musicians worldwide. D’Addario Accessories are proudly made in a state-of-the-art manufacturing facility to the most stringent quality controls in the industry.