Product Features: · Metal Fan Housing and Fire Proof UL94V-0 PBT Fan Impeller Material · State-of-the-art Digitally Controlled Fan Motor ( EC Motor) · Supporting Full Range of Input Power 110v-120v / 220v-240v · Consuming Only Half the Power of Other Regular AC Motor Fans · High CFM Output and Linear Airflow · Exceptional Static Air Pressure Performance · Fully Adjustable Speed Controller · Double Heavy-duty 6mm NMB Ball Bearing · Universal Mounting Positions for Easy and Fast DIY Installation