This item is REFURBISHEDThe Nest Learning Thermostat 3rd Generation is the most intelligent thermostat you ll ever own and is the most intelligent addition you ll ever include in your home. Using its auto-schedule feature and your phone s location it learns when you re home what room temperature you enjoy and when you usually go to bed all within a week. Connect to Wi-Fi on your smartphone tablet or laptop and control the temperature from afar.Trying to find to a balance between a comfortable home temperature and saving energy costs is tough. The Nest Learning Thermostat finds the sweet spot for you. It knows when you re not at home or not awake and learns to adjust the temperature accordingly. You ll know when it s using less energy when you see the Nest leaf appear on the display.It also knows tricks to keep the energy bills down like turning on the fan to circulate cool air every so often so you re not blasting the AC all summer.