Smart thermostat with energy-saving Auto-Schedule and TruRadiant technology, learns about the home and user temperature preferences to create a schedule, using energy only when needed to help save money. Features Home/Away assist which provides automatic adjustment to temperature and hot water if the home is empty. Works with - Amazon Alexa - Google Home - iOS App - Android App 9-32°C Temperature Range Suitable for All Boilers Mains-Powered with Battery Backup Thermostat 2-Wire Receiver Backlit LCD Display 2 Year Manufacturers Guarantee, extended to 5 Years if installed by a Nest Pro Installer (Registration Required, T&Cs Apply) Hub Not Required Works with - Amazon Alexa - Google Home - iOS App - Android App 9-32°C Temperature Range Suitable for All Boilers Mains-Powered with Battery Backup Thermostat 2-Wire Receiver Backlit LCD Display 2 Year Manufacturers Guarantee, extended to 5 Years if installed by a Nest Pro Installer (Registration Required, T&Cs Apply) Hub Not Required