Description:It is silent operation and 4 cutter design that make this fan will not affect your work and can produce greater airflow or velocity at a lower furnace temperature.Thanks to heat powered design, it does not need batteries and can reduce emissions caused by burning less fuel.This heat fan is made of alumina material, which is durable and practical.The length of the fan is 23cm, the width is 14cm and the height is 7.5cm.This stove fan is powered by transforming heat into energy, without using any battery or electricity.Item Name: Heat Powered FanMaterial: AluminaInitial Temperature: 70 Degrees Celsius(158 Fahrenheit) Maximum Operating Temperature: 345 Degrees Celsius(653 Fahrenheit) Airflow: 80-170CFM(Cubic Feet Per Minute) Noise: Less than 45dbSize Details: 23cm x 14cm x 7.5cm/9.06" x 5.51" x 2.95" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Heat Powered Fan1 x User Manual