The Snark Clip-On Chromatic Guitar Tuner and Metronome helps you tune your instrument, sensing the vibrations from whatever instrument it is attached to. Achieve a fast and flawless tuning that lets you get back to the real fun of playing sooner. The Snark clip-on tuner is chromatic, allowing sensing of all sharp and flat notes. The Snark SN1 tuner and metronome is optimized for use with guitars. The SN2 tuner and metronome has a broader frequency range that is ideal for use with any instrument it is attached to. Snark - tuning bliss is this.