Aguilar's proprietary Trans Linear Control (TLC) circuit achieves unprecedented levels of performance in a small bass effect package. The Aguilar TLC compressor pedal features a four-knob layout to provide a full set of important features. Using a wide range of attack times and variable threshold and slope levels, you'll be able to dial in just the right sound.Features: Threshold control: variable from -30 to -10 dBu Slope control: variable from 2:1 to infinity Attack control: variable from 10ms to 100ms Level control: -infinity to -3dBu Low Distortion: (<0.2 %) Gig-saver bypass (signal passes even if your battery dies) Power: Nine-volt battery or optional universal power supply Heavy Duty steel construction Inputs: One 1/4" jack Outputs: One 1/4" jack Controls: Engage switch