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The BOSS WP-20G Wave Processor and OC-20G Poly Octave represent a major breakthrough in guitar pedal technology. With their 13-pin GK Pickup inputs, these compact "GK Effect" Pedals can process each guitar string individually, yielding amazing synth-type effects (WP-20G) and polyphonic octave capabilities (OC-20G) far beyond any effects pedals in history.

Features:
Fat synth sounds and effects in a compact pedal for GK-equipped guitars

Provides 6 synth-type waves and effects-Saw Lead, Square, Ring Mod, Slow Gear, Sitar and Acoustic

11 chorus and delay effects, plus Color and Level knobs for further tweaking

Rugged, dual-pedal design with simple, knob-based controls