Dual 12cm USB fans is very suitable for AV receiver/cabinet/game console/PC/laptop/TV box/DVR/router to dissipate heat. USB Plug,can Connect the fan With USB ports found behind Router,PC Chassis,TV Box or Other The double ball bearing has a service life of 65,000 hours, and the 7 blades produce strong airflow to keep the cabinet cool. There are three speed controllers with low gear (L), middle gear (M) and high gear (H). Shockproof foot pads can make the fan lay flat or upright. 1