Mains powered 3-wire connection to the boiler ErP Class V = 3% using optional OpenTherm output for modulating boilers 16A relay for electrical heating Control via app or thermostat Universal solution Bluetooth connection No Wi-Fi required Manufacturer Stock Code:2290M EAN Code:5016254110131 Sub-Category:Thermostats Brand:Drayton Range:Digistat + Category:Heating Controls Type:Wired