The Micro Violin / Viola Tuner features an easy-to-read, multi-color display in an attractive compact design. A non-marring, lever-lock clamp holds the tuner securely to the instrument while allowing easy application and removal. The precision violin / viola tuner is not only perfect for tuning, the unique mounting system and fast pitch response allow it to be used as an effective practice tool for referencing and improving intonation while playing. D’Addario electronic tuners are designed by musicians for musicians featuring intuitive features, easy to read display's, and exceptional tuning accuracy., Same design as the Micro Violin Tuner modified for wider Viola bodies, Padded mount fits all standard viola sizes & full-size violins, Built-in piezo transducer picks up instrument’s vibration rather than sound, Full-color reversible backlit LCD screen makes it easy to tune in dark environments, Easy to use lever-lock clamp