The AquaPod is part of the automation system that was installed with my pool - Hayward's ProLogic. There is a sensor that reads the pool temperature when in pool mode and spa temperature in spa mode. It also allows me to control pretty much everything about the pool - switch between pool and spa mode, turn on the heater in either of those modes, turn on the deck jets, turn on the cleaner, and turn on and control the lights. There's also a networked module you can add that works with an app or web-based interface to control the pool.