Features: The 80mm 12V exhaust fan delivers 55CFM high airflows with adjustable speed controller (1000RPM-4500RPM), perfect for optimizing ventilation efficiency in DIY projects. Featuring plastic build, this fan kit includes universal voltages support (AC100-240V input / DC3-12V output) for various installations. Ideal for hobbyists, small space gardeners, and workshop owners needing targeted airflows for cooling, fume extraction, or humidity control. Effortlessly ventilate welding stations, 3D printer enclosures, grow tents, or pet houses using the 7.3cm duct compatible design. Engineered for quiet operation and easy integration with standard 8cm ducts, this exhaust fan ensures precise airflows management in confined spaces. Specifications: Component:Plastic Fan speed: 4500RPM Bearing type: double ball bearing Noise: 40dB Input voltages: AC100-240V 50/60Hz output voltages: 3V-12V2A Air duct diameter: 7.3cm Package Includes: 1 Set Ventilation Fan note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.