Guitar compressor effect pedal. Features: Limited Run Anniversary Collection. This is a basic two know job that makes it easy for the user, just like what the classic guitar tones were made of. Unlike most compressors that squash your tone a little too much or have too much noise when kicked on our Squeegee provides toneful compression that is dead quiet and feels like real tubes working hard. 9 volt Negative tip adaptor. True Bypass Switching.