Features: 40x40x10mm USB cooling fan delivers 12CFM airflow at 16dB noise with dc5v power, for silents PC cooling and electronics ventilation. Features oil bearing construction for 2200RPM operation, 45cm USB cable, and plastic housing ensuring stable performances in prolonged use. Perfect for DIY enthusiasts upgrading 3D printers, networking storage devices, or replacing worn out computer case fan. Maintains optimal temperatures in electronics cabinets, desktop PC, and networking switches during continuous operation. Engineered with precisions balanced blades and 0.10A low power consumption, this 4010 fan prevents overheating without disrupting workspaces acoustics. Specifications: Oil-containing bearings Size: 40x40x10mm Color: Black Interface: USB Cable length: 45cm Voltage: 5V Fan speed: 2200rpm Material: Plastic Package Includes: 1PC 4010 USB Cooling Fan note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.