The Jandy AquaLink RS InterLink module allows you to control up to four bodies of water from a single AquaLink Touch or OneTouch controller. The InterLink module integrates two RS systems into one controller. It is NOT recommended to use iAquaLink with an InterLink module. When using iAquaLink it is suggested you use two iAquaLink devices and control them as separate locations through the app. **Limited availability, call before ordering**