The Ernie Ball Expression Tremolo delivers foot-sweepable tremolo control, all without taking your hands off the guitar. Each component was carefully designed for the highest sound quality and performance available. The sleek, compact design maximizes playability, while minimizing the footprint on your pedal board. Unlock a virtually limitless tonal palette that simply can't be matched by traditional "on/off" stompboxes. The sealed aircraft aluminum chassis offers a mechanically and electrically superior experience by protecting internal components from outside elements. Leveraging the 40+ year heritage of our volume pedal, the usability, easy-access controls, and no-slip grip have been incorporated and modernized.