The fan 60x60x15 mm or 2.36 x 2.36 x 0.59 inches; Rated Power: DC 5V 0.2Amps; Speed: 3000rpm; Airflow: 13.8 CFM; Noise: 26dBA; Connection: USB Powered with USB. It can power these directly from the laptop without the need for an external power source, no additional power required, no complicated wiring, just plug it into the USB port and tuck the cables aside. Computer fans for projects requiring cooling or ventilation or as a replacement fan for various products Ball bearing design ensures reliability and longer service life Replace a noisy or failing computer case fan, install it in a computer to increase airflow and cooling