This control system is designed for wireless use in a backyard environment to perform every pool and spa function anywhere the AquaLink PDA packs a powerful pool control system with control of 8 auxiliaries into an attractive and easy to use, compact, water resistant handheld remote. Built-in features like automatic heater cool down, self monitoring freeze protection, and pool cleaner safety delay, virtually eliminates any concerns about equipment operation. Wireless control of thermostats, display of water and air temperatures. Variable speed pump, salt chlorine generator control and programming. Smart color lighting interface. .