Electronic flush-mounted room thermostat for controlling or monitoring temperatures in living rooms, offices and hotels. Suitable for all standard switch ranges. Matt black, 55x55 cover with knob. Suitable for water-based heating systems. Completely noiseless thanks to the use of a triac switch, unlike relays or bimetal. Switchable for actuators normally open or normally closed, therefore can be used for heating or cooling. Adjustable range narrowing in the setting knob as a heating cost brake. A captive screw with threaded insert for fastening the housing cover and practical plug-in terminals facilitate installation. Installation in 55 mm flush-mounted box.