In the words of Mythos Pedals:

Built around the classic CD4049UBE chip this simple gain pedal does everything from pushed tweed breakup to balls to the wall amp on edge of death sounds. The Chupacabra was designed to replicate the tones of the first ZZ-Top records. So no matter if you just got back from baby’s or just trying to find your cheap sunglasses this pedal will give you a Texas size tone with any setup!