This stove fan is powered by transforming heat into energy, without using any battery or electricity. So it is and low energy consumption. It is made from metal, which will not rust or corrode when the fan is getting hot. Can circulate heat throughout the room. Features - Color: Black. - Material: Aluminum Alloy. - Size: 19.00X15.00X9.50 cm/ 7.47X5.89X3.73 inch. - Rotate Speed: 1000-1300 r/mim. - : 5. - Operating Temperature Range: 122 °F - 662 °F / 50 degree centigrade - 350 degree centigrade. - Unit: 160-210 FM. - Power: Thermoelectric Generation Module. - Generate power by converting the heat from your fireplace or wood-burning stove. No electricity needed. - Not so much as electric fan, but enough to blow the hot air to the whole room. - Extremely quiet while working. Say good-bye to the loud noise of electric-forced fans! You won't even know the fan is there, but you'll feel warm all the time. - Made of material, heat-resistant and to use. Start automatically when the temperature of the stove surface reaches around 122°F. - it off occasionally, and put some light oil on the shaft to keep it smoothly and quietly! Package list: 1 x Fan 1 x Thermometer 1 x Instructions