This is a used item that has been tested and confirmed to be working. The Tentacle is an effect pedal that simply adds a one-octave-higher sound to the original sound. It's similar to what you hear in our Hoof Reaper. We developed it because we received many requests from our customers for a simple octave pedal that doesn't require knobs or other controls. There's no doubt that it can be used with any other effect pedal depending on the user's ideas, expanding the possibilities of sound creation infinitely! When used with a guitar, you'll get a more accurate octave sound with the neck pickup and above the 12th fret. ■ Specifications Dimensions: 121 x 64 x 51 (mm) Current Consumption: 10 mA Input Impedance: 100 kOhm Output Impedance: <1 kOhm Flexi-Switching This product is equipped with Flexi-Switch™ functionality. It uses an electronic relay-based true bypass and can be used as a normal latching switch or a momentary (unlatching) switch depending on how you step on it. Thank you for viewing.