Fangrui Product Details The Lef-3807 Has A Straightforward Interface Which Makes It Easy To Choose The Relevant Settings Required For Your Desired Sound Output. It Features A Dry And A Wet Set Option: Dry Controls The Volume Of The Signal Sound, Whereby Wet Controls The Volume Of The Wet Signal. The Rowin Harmonizer Also Features A 13 Set Dial, And Each Of These Options Offer A Unique Shift In Pitch, As Well As The Choice To Go Up Or Down By Not Just One, But Two Octaves. Rowin Have Also Included A Three-way Toggle Switch To Go Up, Detune Or Down. The Combination Of These Controls Along With The Individual Dials Give You A Wealth Of Various Tones With A Range Of Polyphonic Pitches To Experiment With. Rowin Have Fitted A True Bypass Footswitch To The Lef-3807 Pitch Shifter Pedal Which Is Constructed Using Advanced Capacitor Technology. This Not Only Engages The Pedal, But Once Switched On If You Press Down Once This Allows You To Switch Between The Sound And The Effect; Press Down Twice And This Switches Between The Fixed Mode.