This is a TC - Helicon VoiceTone Correct pedal.
TC-Helicon VoiceTone Correct combines pitch correction with tone and dynamic shaping that put a recorded gloss on live singing. Sensing algorithms developed at TC-Helicon automatically adjust the multiband EQ, compression, and de-essing for you, so you get the best sound from VoiceTone Correct with the least amount of effort. Partner your new sound with auto-chromatic pitch correction which helps you sing more in tune, much like a metronome helps for playing in time. For performing singers, VoiceTone Correct is certain to become an indespensible tool.
 
Used good condition.