Control your hot tub through your home Wi-Fi network by using the application on your smartphone. You can set the water temperature, turn pumps On or Off, operate the lights and auxiliary devices. You can also monitor your spa to see the current temperature, operating mode and whether heater, pumps and auxiliary devices are On or Off. The WF110 installs inside the cabinet near the spa controller on a cabinet structural support. Comes with a standard 2foot cable. To extend, add part# 2660 (10 feet extender).