Smart Thermostat: Control your home’s heating from anywhere using the ENGO Smart app or voice commands with Amazon Alexa and Google Assistant Wireless Thermostat: The ENGO E20i battery powered thermostat connects wirelessly to the receiver and can be wall mounted anywhere away from a heat source or direct sunlight WiFi Thermostat: Reliable 2.4 GHz WiFi connection built into the receiver, eliminating the need for an additional gateway hub Smart Heating Controller: Set schedules and manage energy use for optimal efficiency, helping you save on heating costs Alexa Thermostat: Seamlessly integrates with Amazon Alexa and Google Assistant for voice-activated control Stylish and Discreet: Available in black or white, the compact design fits into any home without being obtrusive Multiple Control Options: The E20i receiver can be wired directly to a boiler, zone valve or wiring centre making it suitable for gas and oil boilers as well as heat pumps. The smart heating controller is suitable for radiators and/or underfloor heating. Being wireless makes the E20i a great option for retrofit UFH and allowing all zones to be controlled by one app or Amazon Alexa