The 3rd generation Learning Thermostat from Nest adapts to your heating and cooling preferences within a week of installation and can automatically create schedules. This thermostat features built-in Wi-Fi connectivity and can be conveniently controlled via the Nest app for Android and iOS smart devices. It has a 2.1 inch display with a 480 x 480 resolution that can automatically sense when you're in the room. When your presence is detected, it automatically lights up to display the current time and temperature. With Auto-Away technology, the thermostat can turn itself down when no one is home, conserving energy in the process. It's compatible with a wide variety of heating and cooling systems and features a built-in rechargeable battery.