The EHX Cntl Knob is an affordable, compact, easy-to-use pedal that delivers static remote control for devices with expression control jacks. It lets you set two preset values that represent two positions of a traditional expression pedal and toggle between them with its footswitch. The pedal's EXP 1 Knob selects the first expression setting and the EXP 2 Knob the second. On both, fully CCW cooresponds to the heel position while fully CW to the toe position. LEDs indicate with knob is active and can be powered by your pedalboard's power supply To maximize the Cntl Knob's compatibility with other products it's equipped with a TRS+/- Button that lets you match its expression polarity with the device being controlled. For extra convenience it comes equipped with a 6 foot TRS (Tip-Ring-Sleeve) cable. Features: · Delivers static remote control for EHX pedals and those of other makers that are equipped with expression control jacks · Compact, affordable, easy-to-use · Toggle instantly between two preset expression pedal values · TRS+/- Button for maximum compatibility with devices by all makers · Equipped with a 6-foot TRS cable