Earth Quaker Devices Chelsea Low End Fuzz Driver

From the listing

Seller's description

With only three controls, this deceptively powerful pedal offers you everything from light overdrive to full on distortion with clarity and blissful grinding. A Tone On/Off switch allows you remove the Tone control from the circuit, opening up a whole new world of midrange grind. Switch it off for a simplified and straightforward attack or leave it on for a full-bodied distortion with loads of low-end with a slight natural scoop. Roll up the Sustain for wall-shaking bass notes or sustaining lead and adjust the Tone for a wild and wide frequency response from aggressive top end to low-end rumble.