Feature:1. [Fireplace Fan] This is a fan that uses thermal energy as an energy source to circulate the hot air generated by the wood burning fireplace, durable and efficient.2. [Thermoelectric Module] With thermoelectric module, the current is generated by the difference in heat between the top and bottom surfaces to drive the fan to rotate.3. [How To Use] Put it on the burning stove, absorb heat to drive the fan to rotate, so as to blow the hot air above the fireplace directly to the living area, increase air circulation, and improve heating efficiency.4. [Heat Power Supply] No need to use batteries or power on, can efficiently circulate warm indoor air, silent operation, no noise, suitable for home living room.5. [High Safety Factor] The rotation speed of fan depends on temperature of furnace. The higher the temperature of furnace, the faster the speed. When furnace temperature is so low that the fire is extinguished, speed will slow down until it stops.How to Use:It is powered by heat and does not require any batteries.Specification:Item Type: Heat Stove FanMaterial: Zinc AlloyColor: BlackWeight: Approx. 700g / 24.7ozProduct Size: Approx. 21x14x5.5cm / 8.3x5.5x2.2inFan Blade Radius: Approx. 9cm / 3.5inLeaves: 4 LeavesHigh Temperature Resistance Up To: 400℃ Package List:1 x Heat Stove Fan1 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.