The Farm Pedals - Fly Agaric Phaser is a four stage phaser with two independent LFOs. Two knobs control the independent speeds. Matched with a direction altering footswitch, this pedal allow for a wide range of textural cross-phasing. The right switch engages the pedal, while the left mirror-switches the speed of the first LFO. Really cool and unique pedals from Western Maine. From Farm Pedals: Left Footswitch (heart): Mirror switches the speed of the first LFO. When the left heart switch is engaged (light on) the speed of the first LFO will immediately flip. This switch is handy for creating textural cross-phasing on the fly. Right Footswitch: Engages PedalEach pedal is hand stamped and the pedal you receive may differ slightly from the one pictured. Assembled in Casco Maine with carefully hand matched transistors.Industry standard 9vlt jack, no wall wart included, no battery option, isolated power recommended. .