Buy at www.musicianscart.com Dunlop MXR M107 Phase 100 Phaser Guitar Effect Pedal,This big brother of the Phase 90 offers a broader range of sounds in a larger unit. Along with the speed control there is a four-position rotary switch that selects four different intensities, defined as preset waveform patterns. Between the intensity and speed settings, youll find quite a supply of excellent sounds tucked away in this orange casing.Power: Single 9-volt battery or Dunlop ECB-003 AC Adapter – Controls: Footswitch toggles effect on/bypass (red LED indicates on) Intensity knob selects one of four preset phase waveforms Speed knob varies rate of phase sweep.