Easy control heater: Adjust the knob on the right to turn the unit on. "I" is for producing heat at 750 watts, "II" will produce heat faster and hotter at 1500 watts, and "Fan" will blow out cool air. Then turn the thermostat knob on the left toward the + sign. The adjustable temperature range is 0℉ to 158℉. It will get the heater to cycle on and off according to if the room's temperature reaching heater's setting temperatureEnergy efficient heater: With PTC ceramic heating tech and high speed fan, this heater put out tons of heater to heat up 200 square feet in seconds. Helps to save electric bills by heating up needed small spaces instead of heating the whole house with other centralized heaters. It's quiet enough to use in a bedroom while sleepingPortable mini heater: Dimensions: 6.2 x 7 x 9.2 inch, 3.2 pounds light weight mini heater easy to carry around with handle. This 120V heater has 6 feet long cord and 2 prong connection fits for indoors use such as office, room, desk, home, bedroomSafe room heater: The heater is made of flame retardant material to achieve zero fire hazard. Tip over protection shut off heater when it's knocked over, perfect for houses have kids and pets. Overheat protection will shut heater off automatically when the heater overheatLong serving life: Tip over swicth, overheat protection, rubber extension cord, flame retardant and ceramic speedy heating and cooling for its steady operation and a long serving life, no extra worry on accidental damage for winter life