The MXR CSP105 Vintage '75 Phase 45 pedal reissues the rare little brother of the Phase 90 to exacting specifications. With 2 stages of phasing, the Phase 45 guitar pedal offers up its subtle and musical voice via hand-matched FETs and a hand-wired circuit board. The MXR Phase 45 phaser pedal is equipped with a bypass footswitch and a speed knob. Rotating the speed knob in a clockwise motion results in a faster phase effect, and turning it counterclockwise slows it down. The MXR phaser pedal is powered by a single 9V battery, accessed by removing the stompbox's bottom plate. Texture your tone without overpowering your sound with the limited-edition Vintage '75 Phase 45 phaser pedal..