Roland GR-55 Guitar Synth - With GK-3 Pickup. With decades of experience developing the industry's hottest guitar synths, Roland's GR-55 guitar synth and effects processor gives you more incredible tones and features than ever before, making laggy and inaccurate tracking a thing of the past. When Roland designed the GR-55, they totally redeveloped their already leading pitch-detection technology to bring you their fastest guitar synth ever. Pitch, velocity, sustain - the GR-55 doesn't miss a thing! Using the included GK-3 hex pickup, your guitar can conjure up screaming leads, rich pads, piano accents, and much more. FREE SHIPPING.