Features:Eco-friendly and self-powered:The thermoelectric module acts as a small generator to power the fan39;s motor. Improved warm air circulation without batteries or electricity brings greater comfort and reduces wood consumption for the stove. Longer service life:The fan base has a bi-metal safety device. If the surface temperature rises above around 300C, a safety device gently lifts the front of the fan to protect the TEG and motor. Safety design:The furnace fan bracket is made of anodized aluminum, which can withstand high temperatures and will not deform or discolor even after working for a long time. Automatic start:Upgraded technology, faster speed and greater air volume. Thermodynamic stove fans are designed to circulate hot air produced by wood/coal or pellet combustion. Effectively circulates hot air throughout the house. Silent: Designed blades with larger air volume and lower noise. 39;You won't even know the furnace fan is there, but you feel the warmth. You will enjoy the warm air in a quiet and comfortable environment. Packing list:1 piece 4-blade thermal power furnace fan Specifications:Material:Aluminum alloy Color:Black, bronze, gold, silver Product size:110x70x145 mm/4.33x2 .76x5. 71 inches Net weight:500g/ 1.10 lbs Air volume:180-210 Wind speed:800-1100rpm Noise:35dB Operating temperature:60-350C Note:Please allow 1 -2cm error caused by manual measurement. Due to differences between monitors, images may not reflect the actual color of the item.