Gibson J-45 Progressive Acoustic-Electric Guitar The Gibson G Force Tuning System gives you quick access to standard and alternate tunings. The Titanium saddles allow easy string height adjustments and superior acoustic guitar intonation. Active PZM Bridge plate pickup provides excellent acoustic sound reproduction and perfect for percussive acoustic playing styles. Along with a new Autumn Burst finish and an engraved truss rod cover. Fingerboard edge is softened to comfortably fit the contour of the player's hand and finer grit sand paper and polishing compounds are used for a high gloss finish.