Industry recognized and a longtime favorite for boat life and van life adventurers. The Ultimate fan offers a compact design, cage free whisper-quiet operation, low power draw and two speeds, resulting in maximum airflow. Specifications Dimensions: 5. 25" x 2. 5" x 8. 0" Draw: 12 Volt: Low 0. 28A ? High 0. 41A CFM: 150-200 and Maintenance The Ultimate requires very little maintenance. Unplug the unit before cleaning. A vacuum can be used to clear the fan of any dust build-up, and a dry cloth may be used to wipe the outer surface. Do not attempt to open the unit to clean. Do not use gasoline, thinner or other harsh chemicals to clean the fan.