From the Digitech site: Each distortion stompbox features a huge range of different distortion types that can be morphed into different combinations as you rotate our exclusive Distortion Morph knob. This gives you a near unlimited supply of combinations. Now, you are no longer stuck with only one distortion type in a pedal. But thats not all. There are two outputs, one for normal signal out, and one that features advanced cabinet modeling for live and recording direct-to-board applications. And instead of the standard stompbox tone controls, weve even incorporated our innovative spectral-contouring EQ, which delivers a far greater tone range than other distortion stompboxes. This thing is great with bass. MINT condition, ships 70 dollars new at Musician's Friend. Morphs between the ProCo Rat, the Boss DS-1, and the Arbiter Fuzz Face, all of which sound ROCKIN' on bass. 40 DOLLARS, TRADES ACCEPTED.