Features： 1、Heating Power Supply: Using heating and power supply fans, no battery or electricity, environmental protection, low consumption. 2、Hot Air Horizontal Transfer: This fan is different from the vertical heat of a standard furnace, which uses blades to transfer the hot air horizontally. 3、Automatic Start: The fireplace fan can start automatically, and the speed can be adjusted according to the furnace temperature. 4、Aluminum Alloy Material: The fan base and blades are made of aluminum alloy, which will not rust or corrode. 5、Operation Does Not Disturb: This is an easy to install fan, the operation will not disturb your study, work or relaxation time. Specification： Item Type: Dual Head Stove Fan Size: Approx. 20.5 x 10.5 x 13.5cm / 8.1 x 4.1 x 5.3in Base Length: Approx. 10.5 / 4.1in Base Width: Approx. 7.2cm / 3in Blade Width: Approx. 4.2cm / 1.7in Material: Aluminum Alloy Working Temperature: 50℃-335℃ Air Flow: About 220cfm Noise: 15-20dB Power Supply Mode: Thermal Sensor Package List： 1 x Double Head Eight Leaf Fan