The Looker has a wide tremolo rate range from 50ms to 2000ms, which is controlled via the Time knob. The Shape control offers four types of waveforms; Square, Ramp, Inverse Ramp, and Sine modulations. The Depth control modifies the intensity of the effect. The Tap tempo is an effective way to sync with a band or song and with the 1x/2x mode engaged the sound can easily be doubled in time with music (2x) and returned to the original tap (1x). By running the effect into two amps you can achieve a really expansive sound where the effect dodges back and forth or takes on a more subtle wash.