The Intelli IMT-600 Guitar, Violin, and Chromatic Tuner is an intelligent, vibration sensing, clip-style chromatic tuner designed to tune guitars and violins without interference from ambient room noise - all without the use of wires, microphones or pickups. The IMT-600 attaches easily onto your instrument and picks up direct vibrations to ensure accurate tuning every time. Its unique, flexible clamp actually "feels" the instruments vibrational energy instead of relying on sound. This makes the IMT-600 the perfect tuner for a crowded stage where distracting noises can interfere with other tuners.