It comes with a USB extension cable. You can power two fans with just one USB plug. Additionally, each of the two fans has a speed control switch, allowing you to control the two fans independently. The USB fan adopts double ball bearings, which makes it extremely durable, and its service life can reach more than 50,000 hours. It is powered by USB and can be connected to any electronic device with a USB port. The maximum operating current is only 0.33A. Low energy consumption and quiet operation are its most significant features. It can keep working stably all the time. Rubber foot pads for absorbing vibrations are installed on both sides of the cooling fan. They can absorb the slight vibrations of the fan. Meanwhile, they increase the height of the fan, which is conducive to the circulation of the air flow and results in a better heat dissipation effect. Each computer cooling fan is equipped with a speed adjustment switch. The maximum speed can reach 2650RPM, and the minimum speed is 2150RPM. You can select an appropriate speed according to different ambient temperatures to achieve the best balance between quietness and heat dissipation. Specifications:
Product name:USB Cooling Fan 80mm 2Pack
Bearing System:Double ball bearings
Color:Black
Voltage(Max):5V,Current(Max): 0.33A
Speed:1:2150RPM / 2:2450RPM/ 3:2650RPM
Size: 3.62x3.62x1.85 inches (one unit)
Length of USB Cable:1m/39.37in
USB extension cable length:44cm/17.32in