Feature: 1. Applicable Model: Universal motorhome roof vent fan is suitable for RVs, campers, caravans, ships, yachts and other large vehicles. 2. 12V and Solar Power: Using 12V voltage for exhaust in rainy days and no sun. In good weather, solar vent can be selected via a independent switch. 3. ABS Material: The exhaust fan is made of engineering ABS material, has good elasticity, which is not easy to age, and can cope with various harsh environments calmly. 4. Protective Net: The dustproof and insect proof net is designed to prevent insects from entering the vehicle, and effectively block the garbage and dust from the outside. 5. Energy Saving: The black panel in the exhaust fan has a solar energy conversion function and supports use without electricity, but cannot store electricity. Specification: Item Type: RV Roof Exhaust Fan Material: ABS Rated Voltage: DC12V Solar Speed: 1800 Rpm Air Volume: 24CFM Installation Hole Size: Approx. 118mm/4.6in Diameter Circle Installation Thickness: Approx. 50-120mm/2.0-4.7in (Adjustable) Application: Solar exhaust, 12V power exhaust, using 12V voltage for exhaust in rainy days and no sun. In good weather, solar ventilation can be selected via a switch. Applicable Model: Suitable for RVs, campers, caravans, ships, yachts and other large vehicles. Package List: 1 x RV Roof Exhaust Fan1 x Switch Cover5 x Screw Note: The installation is a bit difficult, professional installation is recommended