Here’s how the company introduces this pedal:
An analog-optical tremolo pedal that expands on the technology found in vintage amplifiers. By utilizing digital control, the Heat Wave offers five waveforms global to its two modes: tap and ramp. Tap mode offers tap tempo functionality with four available subdivisions. Ramp mode allows the user to set a slow and fast tremolo speed and accelerate between the two, emulating a classic rotary speaker cabinet. All of this loaded into a pedalboard-friendly enclosure with standard: internal/external tap tempo control, true bypass soft touch switching, and top-mounted jacks. – More info here.