Kurzweil 1000 GX Guitar Expander Module - the rarest of the 1000s, with the awesome guitar and bass (and a few other) sounds...check out the patch list in the photos. Always kept in smoke-free studio and has never given a lick of trouble. Downsizing my home studio; marked very good condition from cosmetic scratches, missing button, and 37 years of use. Check video for quick demo of this unit. Includes power cable, extremely well-packed and ready to ship!!