This heater is 500 W, constant temperature 220 , the temperature cannot be adjusted. The portable heater is designed to provide little space for all people when you are cold this winter. 3s fast heating technology, the PTC helmet element can heat quickly in 3 seconds to quickly feel and enjoy the heat. Take yourself warm this winter, highly efficient and energy-saving. It is a good gift for everyone. Energy-saving, thanks to the properties of the PTC heating element, you always get relatively stable temperature, more comfortable and safer. Overheating protection: will automatically turn off at unusual high temperature, do not worry it leads to fires in exceptional cases. This room heater works silently and without any light to observe your eyes. Thanks to the quiet function, you can enjoy a warm environment anywhere. The small size is perfect for use under or on the table or in the office in your office or home.