Provides wireless connection to the boiler. Features relay or OpenTherm outputs. Offers flexibility with universal operation and optional smartphone control. 3-wire installation. Includes backlit LCD display, frost protection and holiday mode. 5-30°C Temperature Range Suitable for All Boilers Battery-Powered Thermostat 2-Wire Receiver Backlit LCD Display 7 Day, 5/2 Day or 24 Hour Programmable 3 Pre-Set Programmes 8 On / Off Periods per Day Boost Facility 5-30°C Temperature Range Suitable for All Boilers Battery-Powered Thermostat 2-Wire Receiver Backlit LCD Display 7 Day, 5/2 Day or 24 Hour Programmable 3 Pre-Set Programmes 8 On / Off Periods per Day Boost Facility