brand new and high quality Features: Heat powered: Heat powered wood stove fans generate power by converting the heat from stove into electricity, electricity generating units convert the heat energy into kinetic energy to drive the motor, then the blades spin.No batteries or electricity required, eco-friendly. 4-blade, large air volume: Upgrade 4 blades, diffuse warm air throughout the whole room. Just place the stove fan on a smooth flat surface of your stove top ,near the side or back of the stovepipe. Need to place stove fan at least 4" away from stovepipe. It will work when the stove surface hot. 50C(122F)-340C(644F) working temperature: The fan spins when the temperature is reached 50C(122F).The hotter the base of the fan gets, the faster the fan turns, and the more air the fan circulates into the room. It will slow down and stop as the stove cools. Also come with a magnetic thermometer to monitor temperature. Anodized aluminum material: The whole fan is made from anodized aluminum, which will not rust or corrode when the fan is getting hot. Quiet, no noise & 1 year warranty: The only moving part is the blade assembly, quiet and no noise generate. You will not even know this fan is there, but you will feel the warmth. 1 year warranty, please feel free to contact us if you have any question. Specification: Product Name: 4 blade heat powered stove fan Material: Anodized Aluminum Color: Black Product Dimension (HxW): 190x180mm/7.48x7.09in Base Dimension (LxW): 110x75mm/4.33x2.95in Box Size: 135*103*197mm/5.31x4.06x7.76in Operating temperature range: 50C(122F)-340C(644F) Air Flow: 203CFM Power Supply Type: Thermoelectric Power Generator Noise:25dB Quantity: 1 Pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Stove Fan