Designed for multiple heating systems This digital room thermostat is compatible with electric heating, hot water heating systems, and gas boilers, helping maintain a comfortable indoor environment. Dual sensor flexibility Includes an internal aluminum sensor and an external sensor option up to 300 cm (3 m) for monitoring at different locations and to suit your preferences. Precise temperature settings Adjust the temperature accurately between 5 and 40 C with calibration to ensure the actual room temperature matches the setpoint. Visual status monitoring The integrated LED indicator lights up red when the heater is operating, allowing you to quickly check the heating status without hassle. 23 practical use scenarios In a living room warmed by a gas boiler, set a comfortable range (for example 20 to 22 C) and rely on the red LED to confirm when the heating is active. In an apartment with electric heating and a hot water system, use the 5 to 40 C range to maintain stable comfort across rooms, and place the external sensor in a draftier area up to 3 m away for more accurate readings. In a larger home, position the external sensor in a frequently used room up to 3 m from the thermostat to better capture representative temperatures and use calibration to improve room temperature accuracy.