1、The noise is just the amount of air moving through the blower, very little compared to the amazing output and low amp draw. 2、Equipped with very low current draw, high volume air flow, and durable motor, bring you more convenience. 3、The air blower allow the engine compartment, kitchen and bilge to be ventilated, can also be used as a defroster fan. 4、Can cool down the amplifier installed on the boat, can cool a amp rack and bathroom ventilation, etc. 5、Provide ventilation for engine compartments, galleys, bilges, heads racecars, buses, tanning booths, blow up signs. 6、Building ventilation Hi‑Flow 320 CFM capacity up to 25% more efficient than conventional in‑line blowers. 7、ABS plastic construction, and the flexible mount installation is extremely easy without any complicated tools. Item Type: Air Blower Material: ABS Shell + Pure Copper Motor Color: White Blade Diameter: Approx. 250mm/9.84in Tuyere Diameter: Approx. 102mm/4.02in Motor Stages: 6-stage motor speed 960 (r/min) Number of Blades: 4 Ventilation Capacity: 320 cubic feet/minute or 550 cubic meters/hour Application: various scenes such as RV, yacht, motorhome, fishing boat, room, bedroom, etc. Features: 1. Enhanced thermosetting plastic shell 2. Can be installed on any flat surface 3. Plug-in inlet duct link 4. High-efficiency and high-capacity air flow 5. Low current consumption 6. The casing and motor are made of corrosion-resistant materials, and the service life can reach about 5 years. 7. The fan complies with ISO 8846, 10133, 9097, EN 55014, 61000 and American electrical standards. 1 x Air Blower 1 x Manual