Hayward Pro Logic & Aqua Plus System Goldline Wireless Remote Control Assembly Kit P/N: AQL2-SS-RF Operation: The spaside remote communicates with the base station on the Pro Logic/Aqua Logic control unit using RF (radio frequency) technology. When you push a button on the spa-side remote, it sends a command and flashes the LED indicator once. After a brief delay, the spaside remote receives a confirmation from the Pro Logic/Aqua Logic base station and the LED indicator on the spaside remote will flash 2 times. This double LED flash is your confirmation that the command has been successfully trans-emitted to the control unit. If the LED doesn't flash at all or else just flashes once after you've pushed a button, refer to theTroubleshooting section for assistance in re-solving these problems.