This is a still-sealed New Old Stock Line 6 Otto Filter. Just the module, NOT the whole pedal. You can drop it into any Line 6 ToneCore pedal. Great concept that didn't pan out. The Otto was discontinued in 2010.
NOTE! This is just the module for the pedal; you still need a ToneCore pedal housing to plug it into.
Get your hands on tones that are truly funky with the ToneCore™ Otto Filter™ pedal. Otto Filter delivers a splendid cornucopia of auto wah filter effects with Band Pass, Low Pass, and custom Line 6 Twin Filter models that bring ultra-funky and experimental sounds to your pedal board.