If your amp does not already have a tremolo this pedal is a great option.
Model Year: 2000
Price: $125.00 (new)
Where Obtained: Local Guitar Shop
4 knobs: Intensity; Slope; Speed; Volume
All are usable. True bypass switching for noiseless operation with out sucking tone.
Like I said great sounding, does not detract from the tone of your amp, and recreates that vintage Fender vibe
Every knob is usefull and straightforward