Features: This 120mm USB powered exhaust fan features 3 speed adjustment and 70CFM airflows, efficiently removing smoky, odors, and dust from 3D printer enclosures while operating at quiet 1500RPM. Complete with two flexible ducts, 8 mounting screws, and a speed control switches, the plastic blower supports 120mm duct connections for various ventilation solution across multiple environments. Ideal for 3D printing enthusiasts, greenhouse maintainers, and pet house owners requiring reliable air circulations systems with USB/Solar power compatibility. Perfect for ventilating resin fume filled 3D printer tents, eliminating bathroom humidity, or maintaining freshing airflows in workshops and grow tents through its 11.8cm diameter duct adaptability. The integrated speed controllers allows customized airflows management, while the USB 5V design enables flexible installation in confined spaces without compromising ventilation performances. Specifications: Component: Plastic Size: 16.5x11.8cm Speed: 1500RPM Airflows: 70CFM USB cable length: 105cm Package Includes: 1 Set Exhaust 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.