Features: The USB powered inline duct fan features 3 speed adjustable airflow, double ventilation ports for flexible duct connections, and corrosion resistant ABS construction, ideal for efficient smoky extraction and ventilation in spaces. This 75mm diameter duct fan delivers high airflow while maintaining quiet operation, perfect for demanding environments like 3D printer enclosures or electronics workshops. DIY enthusiasts, 3D printing hobbyists, and pet owners will appreciate its universally compatibility with solar panel, power adapter, or batteries for customized ventilation in greenhouses, animal habitats, or workshops. Optimize airflow in enclosed spaces such as resin printer, small bathrooms, or grow tents using the included double ducts and secure mounting screws for hassle less installation across multiple applications. Designed for durability, the fan's ABS housing withstands corrosive fumes and moisture, ensuring reliable performances in soldering stations, hydroponic setups, or outdoor pet shelters with minimal maintenance. Specifications: Component: Plastic Size: 11x7.3cm Size of the middle part: 8.5x8.5cm Speed: 3000RPM Airflow: 50CFM USB cable length: 107cm Package Includes: 1 Set Inline 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.