Features: Brand new and high quality High-quality material selection, manufactured with hydraulic bearings for long life Low noise, heat dissipation, creating a quiet environment, making DIY so easy Multiple power supply modes meet the requirements. The USB fan supports a variety of power supply modes, and DIY is more relaxed and convenient: mobile power supply, mobile phone charger, computer USB interface, etc. Suitable for all types of routers and set-top boxes, mobile hard drives, etc. It can reduce the equipment's working environment temperature and extend the equipment's service life because it has good heat dissipation. Specifications: Material: Plastic Rotation speed: 3000RPM Size: 8cm/12cm/24cm Cable length: Approx. 115cm/45.27inch Package includes: 1 Set Cooling Fan