Description: No Batteries or Electricity required: The stove fan uses heat from the stove surface to rotate, adjust its speed automatically with the stove surface temperature. 4-Blade, Large Air Volume: 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. Whisper-quiet: The only moving part is the blade assembly. You don't even know the stove fan is there,but you FEEL the WARMTH! Material: Made of high strength aluminum alloy which makes the stove fan no burr, fined and neat surface. no deformation and no discoloration even after long time working under high temperature. Less Consumption, More Efficiency: The stove fan will help reduce the fuel consumption and make the room warmer quickly. Specification: Material: Aluminium alloy Air Volume: 180-210 Blade: 4 blade Blade diameter: 17.2cm/6.77inch Motor speed: 800-1100rpm Noise: no more than 35dB Starting temperature: 55-75C Best working temperature: 80-250C Maximum temperature: 350C Product size: 17x9x21cm/ 6.7x3.54x8.27 inch Package Includes: 1 Piece Stove Fan Note: Recommended surface temperature is between 64F - 660F (65C - 350C). Temperatures above this range may damage the stove fan and the electricity generating units. Never handle the base of the stove fan, do not set the stove fan down on an unprotected surface when hot. To move or carry the stove fan, always use the extendable handle while wearing gloves . Keep the stove fan away from small children when in use.