#R0468503 Jandy AquaLink RS4, Pool and Spa Upgrade Kit Includes: Rev T.2 PCB Board, with CPU Card The Aqualink RS4 Upgrade PCB Pool and Spa Combo communicates with Jandy's ePump, Flo Pro Variable speed pumps and others. Upgrades your older AquaLink RS One Touch PCB The AquaLink R0468503 includes the latest upgrade for the RS4 Pool and Spa outdoor power center. Features included: Communicates with Aqualink RS Touch Indoor Controllers Wired and Wireless Units Energy Savings Module New Variable Speed Pump Programming...Accommodates Jandy ePump, VS-Flo Pro, Pentair IntelliFlo and Sta-Rite IntelliPro Variable Speed Pumps AquaLink LED Color Light Control AquaLink Chemical Automation Sprinkler Control R0468503 Jandy AquaLink Upgrade Kits includes a 2018 Rev. T.2 CPU Firmware Card Now compatiable with 2 Jandy AquaPure Chlorine Generator Systems. The following requirements must be met: 1. At least one of the chlorine generators must have the latest revision firmware 02110A10. 2. The address jumpers on one of the Power Interface Boards (PIB) must be set as Device 2. www.zodiacpoolsystems.com