You are Buying a brand New And Factory Sealed Emerson Sensi ST55 Thermostat Works with Amazon Alexa, Google Assistant and Apple. Energy Star-certified Sensi thermostat helps you save on your HVAC energy costs, with features like geofencing, seven-day flexible scheduling, remote access and in-app system usage Most install in 30 minutes or less: use the built-in level and step-by-step app instructions for a quick installation, skip any extra work painting or patching the wall thanks to the standard thermostat size Extensive compatibility: works with the HVAC equipment found in most homes - a c-wire is required for heat-only, cool-only and heat pump systems, check system and router compatibility at sensi.emerson.com/compatibility Smart home compatible: works with Alexa, Google Assistant, Apple HomeKit (c-wire required), and Samsung SmartThings smart home platforms