1. This stove fan is powered by transforming heat into energy, without using any battery or electricity. 2. The range of working temperature is about: 140°F / 60°C-662°F / 350°C, higher the temperature, faster it starts to . Attention: the temperature can not be over 662°F when using the stove fan. 3. Can circulate heat throughtout the room. 4. This stove fan is silent and quiet. CFM: 160-210 Speed: 1400rpm Blade number: 5 Noise: less than equal 25dB Start Temperature: 140°F / 50°C Working Temprature Range: 140°F / 50°C-662°F / 350°C Colour:black Material:Aluminum Alloy The actual product may have slight color difference or difference, which not affect the use Package Contents: 1 x Stove Fan 1 x Plate Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.