Feature●This drone type air conditioner fan is compatible with 4-way square ceiling cassettes●The mounting fan rotates to prevent direct wind from hitting the air conditioner like before●Since the fan circulates air, it also helps to improve air conditioning efficiency, and helps reduce heating and cooling costs●It works with air conditioner winds, so no power supply is required. The fan rotates when the air conditioning is operated, so you can see it forgetting to turn it off●There is a normal temperature difference between the ceiling and floor surface, but the power of the fan reduces the temperature difference in the temperature and reduces the cold of your feet●Blade Diameter: Approx. 12.8 inches (326 mm); Weight: Approx. 27.9 oz (780 g); Material: ABS, PVC, aluminum, stainless steel●● Installation is easy without the need for special equipment. Simply assemble the unit with a simple tool such as a screwdriver and hang it in the center of a square ceiling air conditionerDescription