Roland GR-55GK Guitar Synthesizer w/ GK-3 Pickup A fusion of guitar synthesis and powerful COSM guitar modeling Up to four sound sources at a time - two PCM synthesizer tones, plus COSM guitar modeling and normal guitar input Easy to use and easy to play with hundreds of great, ready-to-use sounds for rock or pop guitarists Over 900 of Roland's fully editable PCM sounds, including pianos, organs, strings, vintage synthesizers, and much more COSM guitar and amp modeling