ExpiredGoogle Nest Thermostat 

ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone