Working Temperature Range: 140F / 60C~662F / 350C Size: As shown Color: Black Blade Number: 5 Start Temperature: 140F / 60C Material: Aluminum Noise: 25dB Speed: 1100rpm Package Including: 1*5 Blades Heater Stove Fan/1*5 Bla des Stove Fan Blades Features: This stove fan is powered by transforming heat into energy, without using any battery or electricity. The range of working temperature is about: 140F / 60C~662F / 350C, higher the temperature, faster it starts to spin. Can c irculate heat throughtout the ro om. This stove fan is silent and quiet. Attention: the temperature can not be over 662F when using the stove fan. Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it