Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.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 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. Lock feature: No Programmable thermostat that lets you create 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 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 Control Nest Thermostat with Google Home and other smart home platforms. Compatible with Google Assistant and all Matter-certified voice assistants. Voice control requires a compatible smart device. Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers