★【EFFICIENT EXHAUST】★ The exhaust fan has high efficiency for fast ventilation to improve air quality by clearing humidity and odors quickly. Strong wind but quiet operation, low noise during work. ★【HIGH-QUALITY MATERIALS】★ Adopts high quality ABS material for frame and blade, painted white finish, and energy‑saving. Build‑in copper motor with thermal protection, can work continuously without maintenance, dependable to use. ★【EASY TO INSTALL】★ Roof exhaust fan, support top mounting, easy to install without any complicated tools, compact size for space‑saving installation. Equipped with dust‑proof mesh. ★【WIDE RANGE OF APPLICATIONS】★ Widely used in marine boat, yacht, RV, trailer, motorhome, etc. Can be applied to kitchen, bathroom, bedroom, etc. Installation Thickness: Approx. 80-160mm/3.1-6.3in (Adjustable). ★【WIDE RANGE OF APPLICATIONS】★ We are very confident in the quality of this exhaust fan, and provide warranty or refund for it. Please feel to reach us if you have any questions about your purchase. We will solve your problem within 24 hours. Specification: Item Type: RV Fan Material: ABS Rated Voltage: 12V Hole Diameter: Approx. 118mm/4.6in Speed: 1800 rpm/min Air Volume: 60CFM Installation Thickness: Approx. 80-160mm/3.1-6.3in (adjustable) Installation Method: open hole, connect at both ends to install Usage: Install and fix and start working Wiring: Positive pole of the fan connected to the middle tripod of the switch. Negative pole of the fan connected to the negative pole of the power supply. The positive pole of the power supply is connected to the tripod at both ends of the switch. Package List: 1 x Fan 1 x Air Outlet 5 x Screws 1 x Manual