Designed for multiple heating systems This digital room thermostat is compatible with electric heating, hot water heating systems, and gas boilers, helping maintain a stable indoor environment. Dual sensor flexibility Includes an internal aluminum sensor and offers an external sensor option up to 300 cm for flexible placement and monitoring according to your preferences. Precise temperature settings Set the temperature between 5 and 40 degrees Celsius with fine adjustment, and use the calibration feature to align the thermostat with the actual room temperature for accuracy. Visual status monitoring An integrated LED indicator lights red when the heater is operating, allowing you to quickly check the heating status at a glance. Use scenarios Replacing an old thermostat in a home with a gas boiler to maintain consistent comfort and reliable control. Installing the external sensor up to 300 cm away from the thermostat in a large living area or near a draft source to improve temperature monitoring and response. Calibrating the thermostat to match actual room temperature, enhancing energy efficiency and reducing unnecessary heating. Key attributes Compatibility: electric heating, hot water heating systems, and gas boilers Sensors: internal aluminum sensor plus external sensor option (up to 300 cm) Temperature range: 5 to 40 C with precise adjustment and calibration for accuracy Status indication: red LED shows when the heater is active