Features: Brand new and high quality High quality material selection, manufacturing long-life hydraulic bearing Low noise, heat dissipation, saving a quiet environment, making DIY so simple Multiple power supply modes meet the requirements. The USB fan supports a variety of power supply modes, and DIY is more casual and convenient: mobile power supply, mobile phone charger, computer USB interface, etc. Suitable for all kinds of routers and set-top boxes, mobile hard disks, etc. It can reduce equipment working environment temperature and prolong the service life of equipment as it has great heat dissipation. Specifications: Material:Plastic Rotating speed:3000RPM Size:8cm or 12cm or 24cm 8cm:Approx.8x8x4.5cm or 3.15x3.15x1.77inches 12cm:Approx.12x12x4.5cm or 4.72x4.72x1.77inches 24cm:Approx.24x24x4.5cm or 9.44x9.44x1.77inches Cable Length:Approx.115cm or 45.27inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Cooling Fan Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store