Behringer UP300 Ultra Phase Shifter 2-Mode Phaser Effects Pedal Get 2 phasers in one - sound modeled after 2 of the most legendary pedals This Behringer product has been designed to compete head to head with leading products on the market Dedicated Level, Rate, Depth and Resonance controls for awesome sound shaping Blue status LED for effect on/off and battery check Runs on 9 V battery or the Behringer PSU-SB DC power supply (not included)