Feature:1. [HEAT POWERED FAN] With a thermoelectric module, the current is generated by the heat difference between the top and bottom surfaces to drive the fan to rotate.2. [EASY TO USE] Put it on the burning stove, absorb the heat energy to drive the fan to rotate, blow the hot air directly to the living area, increase the air circulation, and improve the heating efficiency.3. [ROTATION SPEED] Rotation speed of fan depends on the temperature of the furnace. The higher the temperature, the faster the speed. When temperature is so low that fire is extinguished, speed will slow down until it stops.4. [HEAT POWER OPERATION] No need to use batteries or electricity, use thermal power as an energy source, which can efficiently circulate warm indoor air.5. [LOW NOISE] This fireplace fan uses high quality zinc alloy materials, high temperature resistance, silent operation, no noise, and is suitable for home living rooms.How to Use:It is powered by heat and does not require any batteries.Specification:Item Type: Heat Stove FanMaterial: Zinc AlloyColor: BlackWeight: Approx. 730g / 25.7ozProduct Size: Approx. 21x14x5.5cm / 8.3x5.5x2.2inThermometer Diameter: Approx. 6.3cm / 2.5inFan Blade Radius: Approx. 9cm / 3.5inBlades: 4 Blade Package List:1 x Heat Stove Fan1 x Thermometer1 x English ManualNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.