Clamp the Intellitouch PT10 onto your instrument and tune away, no matter how much noise is going on around you. Smart tuner learns your custom frequency reference and remembers it even when turned off. Swiveling display. 7-octave range. Intellitouch tunes electric and acoustic guitars, basses, violins, banjos, mandolins and other plucked stringed instruments without interference from ambient room noise, all without the use of wires, microphones or pickups. Tuning in noisy environments is a snap because the unique, flexible clamp actually "feels" the instrument's vibrational energy instead of relying on sound and adjusts to provide a perfect view of the backlit display.