A pedal board friendly RAT, Turbo RAT, and SOLO combo. The three way switch selects which version you want. True bypass switching and nice Dist knob, though the Volume and Filter knobs are small and feel cheap. Includes the LM308 Chip like the originals (though I truely don't believe that chip types makes that much of a difference tonewise-see WAMPLERS Chip comparison video). Pretty good RAT clone.