Electro-Harmonix Super Pulsar Stereo Tap Tremolo and Power Supply Warm, analog, stereo tremolo. Sculpt the tremolo's shape with adjustable sine, triangle and pulse waveforms, or 9 user programmable, rhythmic patterns. Internal/external tempo control + tap divide. Envelope follower section gives dynamic control over depth & rate. Expression pedal or CV gives control of Rate, Depth, Shape, Phase and Volume. Save and recall up to 8 presets. True Bypass. 12 dB volume boost available. EHX9.6DC power supply included.