Features: 5Blades,Faster Speed,Larger Air Volume. Speed up air circulation and improve the efficiency of heat fans, to heat your room quickly. It widely used for wood burning stove, pellet stove and more. No batteries or electricity required, the moelectric module acts as a small generator to power the fire fan's motor. It is usually used in wood stove, fireplaces, etc. Specifications: Material:Aluminum Alloy Color:Black Model:DY5005 Size:Approx.212x145x110mm/8.35x5.71x4.33in Operating temperature range: 122F~662F(50~350) Air volume unit: 160-220 Wind Speed Range: 1000-1600rpm Noise: 25db Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Heat Powered Stove Fan