The ultra-quiet fan system is designed to cool home theaters, entertainment centers, and audio video cabinets. Features a speed controller and 6 foot power cord. Included fans use a custom motor engineered to minimize noise during speed variations and are certified by CE and RoHS. Contains AC Infinity axial fans ACX-FD8025(B)05W5 which meet UL-507 standards for safety under Underwriters Laboratories certificate E503903. Containing dual ball bearings rated at 67,000 hours, the unit can be mounted in any direction. Features a CNC machined aluminum frame with a modern brushed black finish. Fans are set to exhaust air out the frame but this can be reversed to intake air using a screw driver. Includes all necessary hardware to easily mount the unit onto a cabinet and power it through an USB port or standard wall outlet.