Features:
Programmable smart thermostat that learns your schedule and the temperatures you like and programs itself to help you save energy and stay comfortable 
Home/Away Assist automatically adjusts itself to an Eco Temperature after you leave so you don't heat or cool an empty home 
Remote control lets family members change the temperature from anywhere on a phone laptop, or tablet[1] 
With Energy History just check your phone to see how much energy you used and why, or use Quick View on the thermostat's display to reach Energy History, settings, or your schedule 
Smart thermostat with HVAC monitoring which looks out for your heating and cooling systems; sends an alert if something doesn't seem right, along with helpful reminders to make maintenance easier[2] 
The Nest Learning Thermostat works with the Nest Temperature Sensor (sold separately) to help make sure a certain room is the exact temperature you want it to be 
Beautifully designed with polished metal finishes and bright, high resolution display; Farsight shows you the temperature, weather, or time on your thermostat when you walk in the room