Polytune Clip-On Guitar Tuner Black. PolyTune Clip-On perfectly combines state-of-the-art tuning technology with an unprecedented attention to aesthetics and functionality, PolyTune Clip-On gives a tune-up that's unmatched in speed, precision and grace. PolyTune Clip-On is designed to be your trusty tuning companion, whether you're going for a quick onstage tune-up or an ultra-precise setup of your instrument. PolyTune Clip-On sports three distinct tuning modes ranging from the game-changing polyphonic tuning mode that lets you tune all 6 strings at once, to your trusty chromatic tuner and all the way to an ultra-precise strobe tuner mode, which offers +/-0.02 cents of tuning precision. No matter what method you choose to use, the tuning trinity of PolyTune Clip-On will always guide you to pitch perfection. Developed with a luthier-like attention to detail, PolyTune Clip is the perfect combination of beauty and brains. With its carefully chosen high-quality components and stunning clean looks, PolyTune Clip-On is designed to complement you and your instrument, while containing the most advanced tuning technology to date. TC Electronics condensed their proprietary PolyTune algorithm, shrunk key components and increased battery life all while creating a tuner more powerful than any PolyTune released before it.