Features:Brand new and high qualityHigh quality material selection, manufacturing long-life hydraulic bearingLow noise, heat dissipation, saving a quiet environment, making DIY so simpleThe power input interface is 5.5x2.1mm, and this fan can only be used with DC12V power.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:PlasticPower input interface: 5.5x2.1mmRotating speed:2000RPMSize::Approx.12x12x5cm/4.72x4.72x1.96inches 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:1x Cooling Fan