DigiTech Whammy

Compact Polyphonic Drop-tune Pitch Shifter with Momentary/Latch Switching and True Bypass

Guitar Pitch-Shift Effect Pedal - Pitch Effects, Drop and Raised Tuning, and True Bypass

Pitch Shifter/Harmony Pedal for Electric Bass Guitar, with Three Octave Pitch Range and Built-in Expression Pedal

Whammy Guitar Pedal Pedal with MIDI In

Pitch Shift Pedal for Guitar