The Google Nest Wifi Smart Thermostat in Charcoal is a programmable thermostat that is compatible with universal products and can be controlled through app control or voice commands with Google Home/Assistant and Amazon Alexa. It comes with batteries, a display base, and wall screws for wall-mounting. The thermostat has a 2.4-inch display and a 7-day programmable schedule. It is made of plastic and has a round shape. The thermostat is powered by AAA batteries and has Wi-Fi connectivity. It comes with a 1-year manufacturer warranty.