RainSong JM3000 12-String Jumbo Acoustic-Electric Guitar Unique Guitar crafted entirely using Carbon fiber/Graphite composites Impervious to humidity and temperature changes Brace-free Soundboard/Body and Projectin Tuned Layering for crystalline detail, warmth and volume of the classic Carbon tone Single-piece all-graphite neck and composite fingerboard without truss rod Onboard Premium Electronics Deluxe hardshell case