Ultimate comfort: manage your heating and hot water from anywhere with total precision. Control multiple zones individually by adding more devices, with industry-leading multi-zone control. The Wireless Smart Thermostat X is compatible with most gas boilers and heat pumps (Relay or OpenTherm). The included Programmer even regulates the hot water schedule if you have a cylinder. BRAND NEW IN SEALED BOX Programmer X with Hot Water Control and OpenTherm (boiler and heat pump control, and Thread Border Router) - Wireless Temperature Sensor X - 3x AAA battery - 2x wall mounting screw - 3x sticky pad - wiring accessories - cable