Features Upgrade 7-Blades Stove Fan: Our premium stove fan composed of 7 blades, can produce more warm air and improve the efficiency of the product, giving you maximum benefits. The stove fans start automatically when placed on top of a stove and adjust their speed with the stove temperature. As the stove burns down and cools, the fans automatically shut off. Energy Conservation No Electricity: This eco-friendly Fan requires no batteries or external power, it is powered by the heat produced by your fireplace or wood-burning stove; The heat of the stove top is conducted through the base of the fan and converted to electricity which powers the fan motor. This low-maintenance fan will help keep your home warm. Safety Material Longer Lifetime: This fireplace fan is made from rust-proof anodized aluminum, wear-resisting, with good thermal conductivity. There is a Bi-metallic safety device in the base of the stove fan. If the surface temperature rises above around 350, the safety device gently elevates the front of the fan to protect the thermoelectric module. Compact Design: The fireplace fan uses upgraded technology, faster speed, and greater air volume without any noise. The size of this Heat Powered Stove Fan is small in volume and fits narrow spaces. Ideal for all kinds of wood-burning stoves, gas stoves, pellet stoves, etc. You can enjoy the warm air in a quiet environment. Easy to Use Operating: Just place the stove fan on a flat, smooth surface on the top of your stove, near the side or back of the stovepipe at least 4 inches from the stovepipe. The Fireplace fan self-start at temp as low as 60, do not place the fan on a surface over 350. Specification Material: Alumina Color: Black Size: 14 x 10 x 20 cm Weight: 540 g Operating temperature 60-350 Wind speed: 800-1100 rpm Noise: 35 dB Package Include: 1 Heat Powered Stove Fan