How to Use: Install in a ventilated place and fix it, then connect the wire. Red wiring positive, black wiring negative. Specification: 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. Package List: 1 x Air Blower1 x Manual