Works with high/line voltage(120 - 240 VAC) electric heating systems like Baseboard, Convector, and Fan-Forced Not compatible with 24V HVAC systems, such as Heat Pump or Conventional Air Conditioning systems.Control your devices remotely via Meross app anytime and anywhere with the internet.Works with Apple HomeKit, Siri, Amazon Alexa, Google Assistant, and SmartThings.Highly accurate temperatureandhumidity sensor, supporting Fahrenheit and Celsius displays.Pure white LED backlight, covered by an elegant glass panel. Minimalist design that fits any decoration.Save your heating cost with a 7x24 hours smart graphic schedule. Never worry about arriving home with a cold room, or leaving the house with the system heating. Energy monitor supported, help you track power consumption to live a low-carbon life. With the internal electricity meter, the Meross app provides real-time reports on how much power your devices consume and historical data. Open window detection function. When you open a window for ventilation, it automatically stops heating for a while to help you save even more on your electricity bill.