Specifications Name: Fireplace fan Number of blades: 5 blades Function:eco-friendly / wind / mild air Blade Qunatity:5 CFM: 1000-1300(r/mim) Speed: 1000-1600rpm Noise: 25db Start Temp: Around 55 Work Temp : 55-350 Best Working Temp: 150 (Note:The temperature here refers to the temperature of the fan chip, and the temperature of the fireplace needs to be increased by about 55C ) Features Start Automatically: Upgrade Technology,Faster Speed,Larger Air Volume.The heat powered stove fan is designed to circulate the warm air created by a wood / coal or pellet burning.Efficiently circulates warm air throughout the house. - Eco-Friendly and Self-Powered: Thermoelectric module acts as a small generator to power the fan's motor. No batteries or electricity required Improved warm air circulation results in greater comfort and reduce wood consumption from your stove. - Whisper Quiet: ly Designed Blade,Larger Air Volume,Lower noise.You don't even know the stove fan is there,but you feel the warmthYou will enjoy the warm air in a quiet and comfortable environment. - Safty Design: The stove fan support is made with Anodized Aluminum, able to resist high temperature, no deformation and no discoloration even after long time working under high temperature. - Longer Lifetime: There is a Bi-metal safety device in the base of the fan.If the surface temperature rises above around 300C, the safety device gently elevates the front of the fan to protect the TEG and motor. Material: Aluminum alloy Color: Black Thermometer Specification: Name: Fireplace Thermometer Measuring range: 0-500 Type: Thermocouple Bimetal Thermometer Usage: magnet adsorption type Package A Included: 1x Stove Fan Package B includes: 1x Stove Fan 1x thermometer Package C includes: 1x Stove Fan 1x thermometer 1x Heat shield