The On-Stage CTA7700 Clip-on Chromatic Tuner clips on and tunes various instruments including guitars, bass, violins, trumpets and more. It features a built-in mic plus a vibration sensor allowing you to tune even in the noisiest environments. The CTA7700 also offers an easy-to-read blue, backlit LED display ensuring excellent visibility and the swivel joint adjusts for multi-angle viewing. What's more, the compact and versatile design is not only designed to clip on to various instruments, but also sit flat on desktops allowing you to easily tune most any instrument wherever you may be. Features four tuning modes including chromatic, guitar, bass and violin, plus chromatic pitch pipe, flat tuning and calibration between 430 and 450 Hz.