Features: Our exhaust fan adopts a 3000RPM motor, 3-speed speed control with switches, air volumes of 50CFM, and can be used with a 75mm diameter air duct. The gas is discharged from the circular duct, achieving efficient exhaust and allowing you to experience powerful ventilation effect. This fan is perfect for DIY enthusiasts, hobbyists, and professional who use 3D printers or work in electronic repair rooms, providing reliable ventilation support. Very suitable for use in RVs, greenhouses, pet houses, and bathrooms, it effectively removes smog and maintains a comfortable environment. This fan is designed for versatility and can be powered by a 5V solar panel or a USB power adapter, making it a universal solution for various applications. This fan is crafted from ABS and designed for long-term use, providing a detachable design for easy cleaning and maintenance to ensure long-term performances. Specifications: Material: Plastic Size: 73mm/2.87''x73mm/2.87'' Fan Size: 8cm/3.15''x8cm/3.15'' Speed: 3000RPM Air volumes: 50CFM USB cable length: 105cm/41.34'' Package Includes: 1Set Ventilation Exhaust Fan note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.