Safe and easy to operate:This room thermostat has on or off push button and rotary knob.Dial up and dial down to control power: on O: off.Turn the rotary knob to adjust the underfloor temperature. Heating lED indicator: This electric underfloor heating thermostat has an LED indicator light so you can check if your underfloor heating system is heating up.LED lights up when heated. External sensor temperature measurement:This mechanical room thermostat has a 3m long external temperature sensor to detect the temperature of the electric floor heating system, allowing for more accurate room temperature control. Wide range of temperature settings:This mechanical room thermostat is adjustable to required temperature from 5 to 40. Power Supply Voltage: AC110V 10 percent 50 or 60Hz Ambient Temperature: -5-50 Resistive Load: 16A Temperature Control Range: 5-40 Power Comsumption: