Fender CONCERT is an acoustic guitar with adjustable neck truss rod from nut to last fret, allowing for precise neck alignment adjustments. It features string length and height adjustability for accurate intonation and playing comfort. The special string set 750 provides optimal performance, and changing the string gauge may require neck truss rod adjustments. The instrument comes with a warranty against defects in manufacturing and workmanship when the attached card is returned within ten days of purchase.