The Drum Rocker Cymbal Expansion Kit contains everything you need to add a third cymbal to your Drum Rocker. Just mount the included hardware anywhere on your Drum Rocker stand, attach the cymbal, and connect the cable to add another assignable cymbal pad. We have ncluded a set of color assignment rings so it is easy to tell which color your cymbal pad corresponds to on screen. Please note this is an optional extra and will not work without the Ion Drum Rocker. The Drum Rocker must be purchased separately.