2 fans can be connected together with metal buckles to provide greater air volume, can be used as a laptop cooling fan Dual 14cm USB fans is very suitable for AV receiver/cabinet/game console/PC/laptop/TV box/DVR/router to dissipate heat. The double ball bearing has a service life of 65,000 hours, and the 7 blades produce strong airflow to keep the cabinet cool. Three Speeds: Computer fan features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels. Low gear (L), middle gear (M) and high gear (H), the noise is only 22.2dB in low gear. Fan spliced size 11.2” X 5.7” X 1.81”. Shockproof foot pads can make the fan lay flat or upright. usb fan 140mm dual (1pcs)+Adapter(1pcs)