Feature: 1. HIGH EFFICIENCY COOLING: The solar exhaust fan can provide strong wind to keep the space cool and comfortable, ensuring efficient cooling and wind circulation. 2. ENERGY SAVING SOLUTION: The 20W solar panel serves as a reliable power source, which reduces power costs, minimizes environmental impact, and saves energy and power. 3. SIMPLE INSTALLATION: The solar panel vent fan kit is suitable for round ducts, which is easy to install quickly in any ventilation system without professional tools and skills. 4. ROUND BANNER: It comes with a mounting baffle, which can effectively prevent birds from entering and nesting inside the exhaust fan, ensuring safety and reliability. 5. WIDE APPLICATION: It is ideal for different spaces and environments such as attics, greenhouses, RVs, boats, chicken coops, pet houses, sheds, etc. to meet various needs. Specification: Item Type: Solar Powered Exhaust Fan Material: Monocrystalline Silicon, ABS Solar Panel Power: 20W (Without Power Storage) Solar Panel Size: Approx. 14.5x14.5cm / 5.7x5.7in Exhaust Fan Diameter: 12cm / 4.7in Exhaust Duct Length: 5.5cm / 2.2in Exhaust Duct Diameter: 9.5cm / 3.7in Voltage: 5V. Package List: 1 x Solar Panel 1 x Exhaust Fan1 x Exhaust Fan Round Baffle4 x Screw4 x Expansion Bolt