For use with system and conventional boilers with a separate hot water tank. Designed for new building installations with no hub included. Features include 6 daily time slots of scheduling, 6-hour heating and hot water boost function and holiday mode. Automatic frost protection. Suitable for gas and LPG systems, oil boilers and some electric boilers. Professional installation recommended. Works with - Amazon Alexa - Apple HomeKit - Google Home - iOS App - Android App 5-25°C Temperature Range Suitable for System & Heat Only Boilers Battery-Powered Thermostat 2-Wire Receiver Touchscreen Display 1 Year Guarantee Ready By Pre-Heating Manual Override Smart Hub Required Works with - Amazon Alexa - Apple HomeKit - Google Home - iOS App - Android App 5-25°C Temperature Range Suitable for System & Heat Only Boilers Battery-Powered Thermostat 2-Wire Receiver Touchscreen Display 1 Year Guarantee Ready By Pre-Heating Manual Override Smart Hub Required