Features 1、Ceiling ventilation fan, with the function of air supply and exhaust, bringing freshed air for your vehicle. Unique fan cover, allows light to enter the vehicle. 2、Designed with stainless steel mesh, prevent mosquitoes, insects, sand and gravel from entering the interior of the RV. Imported plastic cover, resistant to yellowing, long durability. 3、Reliable and efficient motor, which is made of pure copper core, low noise operation, which will not disturb you. 4、The fan has 10 blades, which is more stable and quieter, two‑way exhaust, waterproof, and not easy to age. 5、This ventilation fan is suitable for large vehicles such as motorhomes, RVs, buses, yachts, etc. Easy to install, convenient for using. 6、It can eliminate smoke in the kitchen and remove unpleasant odors in the bathroom, give you a more comfortable living environment. Specification Item Type: RV Vent Fan Material: ABS Motor Current: 0.5-2.5A Hole Size: Approx. 340 x 340mm/13.4 x 13.4in (maximum: 380 x 380 mm) Dimension: Approx. 420 x 420 x 182 mm/16.5 x 16.5 x 7.2in Installation Thickness: Approx. 38-95 mm/1.5-3.7in Motor Power: 5W Power: 5-30W adjustable RPM: 1000-1800/minute Fan Blades: 10 Applicable to: Large vehicles such as motorhomes, RVs, buses, yachts, etc. Features: The shell is made of imported and anti-yellowing plastic; equipped with stainless steel mesh Installation Method: Open hole installation Usage: Install and fix and start working Wiring: Black wire connected to negative pole, red wire connected to positive pole Package List 1 x Vent Fan 1 x Manual