The Holy Tuner Guitat Tuner - Installs Inisde your guitar - never forget or lose your tuner again! Super bright led tuning indicators are easily visible through the sound hole Always with you - no more clips, no more lost tuners Chromatic tuner automatically tunes to the note you are playing The Holy Tuner is a patent pending design by Rod Schenk, of Schenk Guitars, winner of the coveted 2008 Player's Choice Gold Award!