Feature: 1. No external power or electricity required, it uses thermoelectric technology to push warm air into the room, not only helps you warm home but also lowers fuel consumption of log burner. You only need to put the stove fan on a flat surface of stove top. 2. The 10-blade heat powered stove fan distributes heat more evenly, so you can get more heat where you need it. 3. The heat active stove fan is designed to circulate the warm air created by a wood/coal or pellet-burning, efficiently circulates warm air throughout the room. 4. This stove fan\u0027s noise level is less than or equal to 35dB, which gives you a quiet environment. 5. The speed of the fan depends on the temperature of the stove. When the stove temperature is higher, the fan speed is faster. When the furnace temperature is low enough(stove fire burned out), the fan speed slows down until stops turning. Specification: Features: [Heat Powered Stove Fan] No external power or electricity required, it uses thermoelectric technology to push warm air into the room, not only helps you warm home but also lowers fuel consumption of log burner. You only need to put the stove fan on a flat surface of stove top. [Double Motor Stove Fan] The 10-blade heat powered stove fan distributes heat more evenly, so you can get more heat where you need it. [Saving Fuel] The heat active stove fan is designed to circulate the warm air created by a wood/coal or pellet-burning, efficiently circulates warm air throughout the room. [Quiet Operation] This stove fan's noise level is less than or equal to 35dB, which gives you a quiet environment. [Auto Speed Adjustment] The speed of the fan depends on the temperature of the stove. When the stove temperature is higher, the fan speed is faster. When the furnace temperature is low enough(stove fire burned out), the fan speed slows down until stops turning. Specification: Type: Stove fan Material: Aluminum oxide Color: Black Number of blade: 10 Air volume: 180-230 Wind speed: 950-1250rpm Noise: ≤35dB Working temperature: 60-350℃ Item size: 24 * 13 * 10cm /9.45 * 5.12 * 3.94in Item weight: Approx. 850g /29.98oz Packing list: 1 * Stove fan 1 * Thermometer Package List: 1 * Stove fan 1 * Thermometer