B-Stock, Walrus Audio Monumentak Harmonic Tap Tremolo Black; Stereo version of Walrus Audio's "Monument" - Harmonic Tremolo, with extended functions; Analog tremolo with optocouplers, for warm, rich modulation; In Harmonic Mode, high and low frequencies are alternately boosted and cut: Treble "On" - Bass "Off", and vice versa; Ramp Up-Down function, for "Leslie" style; 3 presets to save your own settings, additional live mode; 6 LFO waveforms selectable: Sine, Square, Saw, Ramp, Bump, Random; 5 LFO "subdivisions" selectable: Quarter, quarter triplet, eighth, eighth triplet, sixteenth; 3 possible connection variants: Mono In/Mono Out, Mono In/Stereo Out, Stereo In/Stereo Out; Rate determines the speed of the tremolo; Depth controls the intensity of the tremolo; S-B-H control for stepless blending of standard and harmonic tremolo ("Standard - Blended - Harmonic"); The Pan knob controls the width of the stereo image; The Tap footswitch can be used to set the rate; The Ramp function is activated by pressing and holding the Tap switch; Individual parameters can be controlled with an expression pedal, selection via internal dip switch; Controls: Volume, Shape, Pan, Rate, Depth, S-B-H; Switch: Subdivison (button); Footswitch: Bypass On/Off, Tap/Ramp; Connections (6.3 mm jack mono): Mono In, Stereo In, Mono Out, Stereo Out; Connections (6.3 mm jack TRS): Tap/Exp; True Bypass construction; Power supply: 9V - 12V DC ( not included), 100mA (Center Negative); More headroom when using a 12V power supply; Made in the USA, B-Stock with full warranty, may have slight traces of use