HT-04 plug in heating thermostat provides easy to adjust heat management for any electric heater in your home or commercial space. It can be installed without professional installation or expensive call out device, just plug it into the nearest standard power socket, and then plug the heater into the socket in front of this plug socket thermostat. The working principle of HT-04 programmable socket thermostat is to monitor the air temperature, and turn on and off the heater according to your comfort level. Controlling HT-04 plug thermostat is easy, because it has five easy to operate buttons at front of the housing. By manual adjustment, you can set any temperature between - 5 – 35 ° C.  In the rooms you use less frequently, set the temperature at a lower temperature to prevent frost, or set a higher temperature in the rooms you use every day to heat accurately. HT-04 is also equipped with an LCD reader to display the current room temperature, which is more convenient when using the thermostat.    Compared with the traditional plug temperature control thermostat, this intelligent temperature controller also adds the WiFi remote control function. By pairing HT-04 with WiFi, you can ensure heating only when necessary and prevent excessive use of energy, thus helping to reduce energy costs.     The smart plug-in thermostat can be used with any electric heater, provided that its output power does not exceed 3kW. Although the HT-04 plug thermostat can be installed in most places of the home, it is not suitable for installation in the bathroom or any place that may be exposed to water.