Features: 1. Strong wind, low noise, effective and quiet ventilation, quickly removes moisture and odors. Dust-proof filter, two-way large-displacement ventilation. 2. Built-in copper motor with thermal protection, capable of continuous operation without maintenance. 3. Space-saving top mounting design, easy to install, no complicated tools required. 4. Frame and blade made of ABS material, white painted finish, waterproof, dustproof, and energy-saving. 5. Suitable for use in kitchens and bathrooms, ideal for marine vessels, yachts, RVs, trailers, motorhomes, and similar applications. Specification: Item Type: RV Fan Material: ABS Rated Voltage: 12V Hole Diameter: Approx. 118mm/4.6in Speed: 3000 rpm Air Volume: 80 CFM Installation Thickness: Approx. 80-160mm/3.1-6.3in (adjustable) Installation Method: Open hole, connect at both ends for installation Usage: Install, secure, and start operation Wiring: Positive terminal of the fan connected to the center terminal of the switch. Negative terminal of the fan connected to the negative terminal of the power supply. Positive terminal of the power supply connected to the outer terminals of the switch. Package List: 1 x Fan 1 x Air Outlet 5 x Screws 1 x Manual