Electronic flush-mounted room temperature controller for regulating or monitoring temperatures in living spaces, offices, and hotels. Compatible with all common switch programs. Polar white glossy finish, 55x55 cover with button. Suitable for water-based heating systems. Completely silent operation due to the use of a Triac switch, unlike relays or bimetals. Automatically switchable via a change-over input, making it suitable for both heating and cooling. When the clock terminal is connected, it regulates to a temperature that is 3.5 K lower and increases by 3.5 K in cooling mode. Equipped with LED status indicators. Adjustable range limitation on the setting knob acts as a heating cost brake. A captive screw with a threaded insert for securing the housing cover, along with practical plug terminals, facilitates installation. Designed for mounting in a 55 mm flush-mounted box.