Features: 1. Upgrade 5 blades heat powered wood stove fan The wood stove heat powered fan is composed of 5 blades, and the diameter increased to 175 mm which can drive more air circulation when it works, warming your home within maximum efficiency. 2. Thermoelectricity Thermoelectric fan is a very clever device, as well as what it does with regard to distributing the heat around you home it is also self-powered, the heat powered fan has a small motor inside with two semiconductors, the bottom of the pellet stove fan gets hot from the stove and the top of the stove fans is cooler, the differential between the two drives the motor which in turn rotates the blades of the fireplace fans heat operated. 3. The wood stove fans non electric heat powered is made of anodized aluminum which will not rust and corrode in high-temperature and has a higher thermal conductivity efficiency than those steel ones. Operates automatically between 176-662°F with self-regulating speed. 4. Overheating protect The stove fan have an overheating protect device which could protect the stove fan. There is a bi-metallic safety device at the base of the stove fan. When the surface temperature rises around 300℃，the safety device gently elevates the front of the fan to protect the stove fan, by which it ensures the stove fan a longer lifetime. 5. Low noise Upgrade wood fireplace fan heat powered blades are newly proofread which ensure low noise(≤25DB) when operation, never disturb even if you are sleeping or reading, you will feel the warm but not even notice the stove fan is there, give you a peaceful atmosphere! 6. No running cost cocoon fan The best spot is the stove fan no electric or batteries required. It not only save energy to protect environment, but also save money! It means you just put the stove fan on the surface of the fireplace and waiting a minutes, the stove fan will rotate automatically. Specification: Blade number: 5 Dimension: 11×10.5×19cm (L/W/H) Weight: 516 g Noise: ≤25dB Working temperature: 176-653°F(80°C-345°C) Material: Aluminum Color: Black Note: 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.