Three Speed; Reversible with Thermostat. Select speed (1-low, 2-medium or 3-high). Placing the IN/OUT switch in the center (neutral) position can turn off fan blade. The fan will operate at one of three preselected speeds when the thermostat calls for cooler air. Once the thermostat is satisfied, the fan shuts off automatically. Designed to ensure consistent temperatures. With Polar White GarnishQuiet, 12V ceiling fan with 3-speedsSmoke Polycarbonate domeManual Lift DomeThermostat Blue to Red Label, 22°F-123°F rangeRemovable screen for easy cleaningReversible fan blade motor (in or out)Low AMP draw ensures full-time useRooftop weight: 11lbs.Dimensions: 16-1/2 x 16-1/2 x 4-1/2 (Fits Most Standard 14" x 14" Openings)Lifetime Warranty on Dome (Freight charges after 2 years)2 Year Warranty on all other components