The Planet Waves NS Dual-Action Capo features an integrated chromatic tuner and is made from aircraft grade aluminum. Designed for use on acoustic and electric 6 string and most 12 string guitars, the NS Capo Tuner combines the widely acclaimed NS Dual Action Capo with a Planet Waves precision chromatic tuner. The first of its kind, the NS Capo Tuner provides accurate tuning at any fret or when clipped on the headstock of your acoustic or electric guitar. A patented compound action mechanism reduces the force required to open and close the capo. This makes the capo easy to use while the patented geometry applies direct horizontal pressure to the fretboard without pulling the strings side to side as ordinary, single-action, trigger type capos do. This coupled with the micrometer spring tension adjustment allow you to set your NS Dual Action Capo so it virtually eliminates the need to retune as you move your capo on, off or up and down your neck.