This Chromatic Clamp-on Micro Violin/Viola Tuner by D'Addario is a new design specifically for violin and viola (up to 1.57" thick). Its fast pitch response makes this an effective practice tool for referencing and improving intonation while playing. It is smaller and less conspicuous than other clip-on type tuners. The display is a mere 1/4 inch x 5/8 inch. It is a sensing type that picks up vibrations through a highly sensitive piezo transducer. The mount is padded to protect your instrument and the lever-lock clamp is easy to use. These are always less susceptible to interference from noisy environments than other tuners. They are extremely accurate and will work with virtually any size violin or viola. The full-color display makes tuning easy in dim or well-lit environments. Extremely compact design makes this virtually invisible. The adjustable display orientation allows you to rotate the display to any of 4 viewing angles. Can be user calibrated from A410 to A480. Uses one CR2032 battery (included). Also has an automatic shutoff feature that conserves battery life by shutting down after 10 minutes. This is a very handy and useful tuner. I really like the bright display and how quick it reacts to the tone. MSRP $55.80.