THESE INDUSTRIAL FANS FEATURE A QUIET 2-SPEED MOTOR WITH THERMAL CUTOFF FOR OVERHEAT PROTECTION. DBA RATING 62 LOW SPEED / 69 AT HIGH SPEED, DBA MEASURED BY USING IEC 60704 STANDARD. BLOWER FANS HAVE A ROLLER BEARING MOTOR THAT IS HEAT RESISTANT AND MAINTENANCE-FREE. THE STURDY STEEL HOUSING OF THESE PORTABLE FLOOR FANS HAVE FORMED CHANNELS FOR ENHANCED RIGIDITY, A GRIP HANDLE FOR PORTABILITY AND A POWDER COAT BLACK FINISH. GRILLS HAVE CURVED GRID SUPPORTS. 18’L 3-CONDUCTOR POWER CORD WITH PLUG. 120V. FEATURES 3 BLADES. FAN TILTS TO DIRECT AIRFLOW VERTICALLY AND TIGHTENS IN PLACE WITH A SCREW KNOB. 5″ RUBBER WHEELS. THIS PRODUCT IS DESIGNED TO OPERATE BETWEEN 32-104 DEGREES FAHRENHEIT. UL, CUL LISTED. MEETS OSHA AND UL507 STANDARDS. HORSEPOWER RATING BASED UPON MAXIMUM SPEED/LOAD. THIS PRODUCT HAS LIMITED WARRANTY OF 1 YEAR.