This fan requires no batteries or external power, it ispowered by the heat produced by your or wood-burning stove; The heat of the stove top isconducted through the base of the fan and converted to electricity which the fan motor This low-maintenance fan will help keep your home warm The fan base is equipped with a bi-metal device, the surfaces temperature exceeds 250°C, the device gently lifts the front of the fan to protect the TEGand motor This fan ismade from rust-proof anodized aluminum, wear-resisting, with good thermal conductivity Our stove fan composed of 6, can produce more warm air and improve the efficiency of the product, give you benefits The stove 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 automatically shut off The fan uses upgraded technology, faster speed, and greater air volume without any noise The size of this Heat Powered Stove Fan issmall in volume and fits narrow spaces Idealfor all kinds of wood-burning stove, pellet stove, You can enjoy the warm air in a quiet environment, Manufacturer: Mekalero