Really flexible filter pedal that can run in low, band (with internal dipswitch to blend in some clean signal) and high pass modes. Can be swept by positive or negative envelopes, lots of LFO shapes with sample and hold processing, or manually via the trigger switch or an expression pedal.
Some of the paint on the front panel has come off, particularly around the "warp" knob and the filter mode switch. However, it shouldn't be too hard to figure out what's going on if you consult the documentation and use your ears.