The MaxxFan 4-Speed Vent Fan has a powerful 12-volt, 4-speed sealed ball bearing motor that moves air out of your RV for fast, efficient ventilation. This fan is easy to operate with convenient ceiling keypad controls and manual-opening low-profile white lid. You can also use it like a ceiling fan with the lid closed to circulate air inside your RV.• Provides over 900 CFM to keep you cool and comfortable• Easy-to-operate ceiling keypad controls• Manual-opening low-profile lid• Twin lid-lifting arms help prevent lid flutter in high winds or when driving• Operates with lid closed in ceiling fan mode• Flange has built-in waterproof molded mounting tabs for adding optional MaxxAir Fan Mate Cover (sold separately)• Fits standard 14 x 14 vent openings Easy to operate with convenient ceiling keypad controls Can be used like a ceiling fan with the lid closed Fits all standard 14"" x 14"" roof openings | Maxxair MaxxFan 4-Speed Vent Fan, White