Jandy® AquaLink PDA-P4 Pool Only Control System provides feature-rich, complete pool and spa control. The PDA system includes the AquaLink Wireless Handheld Remote for convenient in-home or pool-side control and programming. Virtually every function can be controlled, including jets, lights, pool / spa switching, pump speeds, and heater or heat pump temperature and control settings, to name a few. Schedule filter pumps, pool and yard lights, or any other water feature directly from the AquaLink Wireless Remote. Control your pool from your smartphone, tablet, or any web-connected device when you add AquaLink™ to your PDA system.