Iliving 24" BLDC Air Circulator High Velocity Floor Fan, 115V brushless DC electric motor permits variable speeds for maximum air volume 24-inch 3-blade aluminum propeller with built in 360 degree tilt feature UL and OSHA Compliant, OSHA Standard 1910.212, 1/2" opening requirements BLDC motor enables you to set LOW speed at 10CFM to HIGH of 5800 CFM Equipped with 7 inch plastic and rubber castor for easy portability