Compatible with multiple heating systems: This rotary knob digital room thermostat is designed to work with electric heating, hot water heating, and gas boilers to help maintain an indoor climate. Dual sensor options: It offers a built in aluminum sensor and a 300 cm long external sensor, providing flexible monitoring to suit your setup. Precise control: Set your desired temperature in the range of 5 to 40 C, precise to 5 C, with a calibration feature for the actual room temperature. Clear LED indicator: The integrated LED indicator shows operation, illuminating red when the heater is active for easy monitoring at a glance. Use case: In a living room with electric heating, this thermostat helps maintain a comfortable temperature efficiently. Use case: In a home with a gas boiler or hot water heating, it provides consistent temperature control to suit daily living. Use case: With the 300 cm external sensor, place the sensor in a distant area such as a hallway or sunlit room up to 300 cm away to monitor and respond to temperature changes.