is made with permanently-lubricated ball bearing motors for long lasting durability and reliable performance. Gray steel housing ensures lasting durability. Spiral wire safety guards fan blades. Fan head tilts and swings to provide multi directional air flow. The working ambient temperature range of this model is 0 - 40 degrees Celsius (32 - 104 degrees Fahrenheit). Built in power cord wrap. Adjusting screw on three sides and dual handles provide easy manueverability. 2 rubber wheels on a swivel cart base. OSHA certified, UL listed. 1-Year Limited Warranty.