Dual 140mm Fans with 30% Faster CoolingPowered two 140mm high-pressure fan blades with 11-blade design and upgraded hydraulic bearings,this usb cooling fan delivers 65.8 CFM airflow,dropping device temperatures 30% in 30 seconds at 850RPM±10% speed to prevent overheating for gaming consoles,routers,and PCs as a 140mm usb fan.18dB Ultra-Quiet OperationOperating at 18dB—quieter than a 20dB whisper—this 140mm vent fan ensures distraction-use,ideal for offices,bedrooms,or gaming setups,with noise levels far lower than 50dB normal conversations or 70dB phone ringing, as a silent cooling pad.Universal & Stackable DesignCompatible with cabinet cooling,etc.,featuring 4 transparent 15mm raised foot pads for stackable cooling and an elevated layer to store phones,power banks,or modems,this usb powered fan fits all your devices.Dual USB Ports & Plug-and-Play ConvenienceDual USB interfaces allow powering the fan while charging other devices,with an 31.5 inch cable,one-touch switch,and compact size for flexible placement,making this 140mm usb fan a hassle-cooling solution.40,000-Hour Durability & Heavy-Duty BuildMade from premium ABS,supporting up to 20kg and lasting over 40,000 hours,with shock-absorbing pads to protect surfaces and reduce vibration for long-term reliable performance,this usb cooling fan is built to last as a sturdy 140mm vent fan and cooling pad..