Remotely controls heating and hot water. Control temperature, check energy history, control hot water tank/schedule and receive alerts via the Nest app on a smartphone. OpenTherm technology modulates a high efficiency condensing boiler, enabling energy saving. Functions include auto-away and auto-schedule so that programming is not necessary, as Nest learns from frequent use and programmes itself accordingly. Works with - Amazon Alexa - Google Home - iOS App - Android App 9-32°C Temperature Range Suitable for Combi & System Boilers Mains or Battery-Powered Thermostat 2-Wire Receiver Backlit LCD Display 2 Year Guarantee Auto-Schedule & Auto-Away OpenTherm Technology Hub Not Required Works with - Amazon Alexa - Google Home - iOS App - Android App 9-32°C Temperature Range Suitable for Combi & System Boilers Mains or Battery-Powered Thermostat 2-Wire Receiver Backlit LCD Display 2 Year Guarantee Auto-Schedule & Auto-Away OpenTherm Technology Hub Not Required