Nest Thermostat -New in sealed box- color snow and fog avalible...please state what color when ording The Nest thermostat works with most 24V systems, includings gas, oil, forced air, variable spped, heat pump, and radiant. Use the easy compatibilty checker at g.co/nest/works to confirm your system compatibilty before opening thermostat package. Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow About this item ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page.Connectivity Protocol : ?Wi-Fi.Connectivity Protocol : ?Wi-Fi 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. Lock feature: No Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1] Savings Finder looks for more ways your thermostat can help you save, and suggests tweaks to your schedule in the app; check with your energy provider to learn more about rebates and more ways to save on a Nest thermostat 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] It’s easy to install your thermostat, typically in 30 minutes or less, with everything you need included in the box; it’s compatible with 85% of heating and cooling systems Control the temperature with your voice using smart home devices that work with Google Assistant or Alexa[3] Nest Renew makes it simple to support clean energy right from home; it works with your Nest Thermostat[5] to help you automatically prioritize your usage[6] to times when energy is cleaner or less expensive