GET WARMTH AND COMFORT: The room heater is user-friendly designed with 3 heating modes - 900W high power, 400W medium power and a cooling fan for setting the optimum temperature and enjoying warmth on cold days, or in warm Enjoy the fresh air days.Our space heaters feature PTC ceramic heating technology and refractory materials that provide overheat protection as the heater will shut off when the temperature reaches 167 degrees Fahrenheit. Plus, it has a smart design that automatically shuts off when the heater is turned over. FAST AND QUIET: Thanks to advanced ceramic heating technology, this office space heater is energy efficient and heats up faster, reaching 70 degrees Fahrenheit in just 3 seconds Don't worry, the space heater has no lighting function and is so quiet that you can sleep, read, study or take a nap without being disturbed. PORTABLE AND COMPACT: The heater is very compact, measuring only 7.7 x 4.4 x 5 inches, yet powerful and energy efficient, so you can use it to heat small areas, offices, bedrooms, nurseries, or outdoors while camping, RV trailers and more.