Features: Experience powerful airflows with this 8cm inline duct fan featuring a 4500RPM motor delivering 55CFM, USB powered for versatilitys operation and adjustable speed control. Crafted from durability ABS plastic with a detachable design for easy maintenance, its double ball bearing structure ensures quiet, long lasting performances in demanding environments. Ideal for homeowners, DIY enthusiasts, and makers seeking efficient ventilation solution for enclosed spaces like 3D printer enclosures or electronics workstations. Optimize air quality in kitchens, soldering stations, labs, or pet zones while effectively managing fumes, and humidity with compactly duct connectivity. The 73mm circular duct connectors seamlessly integrates with standard 8cm tubings, offering flexible installation option for electronics cooling, server rooms, or compactly grow tent setups. Specifications: Component:Plastic Diameter:Approx.7.3cm/2.87inch Length:Approx.11cm/4.33inch Fan speed:4500RPM Bearing type: double ball bearing Noise: 40dB Air volumes: 55CFM Fan interfaces: 5.5x2.1mm Cord length:Approx.150CM/59.06inch USB input:5V2A Package Includes: 1pc 8cm Exhaust Fan 1pc USB Speed Control Cable note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.