Amazon Smart Thermostat is ENERGY STAR certified. Easily switch your traditional thermostat and help reduce energy usage. For on-the-go comfort, let Alexa set the temperature, or set it yourself from anywhere with the Alexa app. Guided installation instructions are included in the Alexa app and will walk you through options for powering your thermostat. Although Amazon Smart Thermostat is compatible with most homes, we recommend checking compatibility on Amazon.com before purchasing. Color: White