FEATURES A PERMANENTLY LUBRICATED 3-SPEED 120V SLEEVE BEARING MOTOR. WHEN SET FOR OSCILLATION MODE THE OSCILLATION MECHANISM IS DIRECTLY CONNECTED TO THE FAN BLADES ALLOWING FOR COMPLETE CIRCULAR ORBITAL OSCILLATION INSIDE THE WIRE GUARDS. THE INTERNAL OSCILLATION ALSO MAKES THE UNIT MORE COMPACT AND EASIER TO PLACE IN TIGHT FIT LOCATIONS WHILE STILL MAINTAINING MAXIMUM AIR MOVING FUNCTIONALITY. THERE IS A BUILT IN CORD WRAP FOR ADDED CONVENIENCE. A HAND SCREW KNOB IS INCLUDED TO ALLOW TOOL FREE HEIGHT ADJUSTMENTS FROM 53-3/4"" TO 63"". THE LARGE 23-1/2"" DIAMETER PEDESTAL BASE ADDS TO THE SAFETY AND STABILITY. UNIT US UL AND CUL LISTED.