I've never been happier buying small fans, but they blow a lot of air. I use them on my HP EliteDesk devices that have air vents to keep those devices cool. I push them pretty hard and you can feel the difference in the exhaust out of the box. I would easily guess that this is double airflow. These are USB fans so make sure you have enough voltage to run them. This has helped these devices a lot and I hope they last longer and operate with less cooling. You can buy this product without hesitation. By the way, they are equipped with metal grilles to protect fingers, which can be easily attached to the front and back of these devices. You also get a USB hub (1 male to 2 female) so you can run two fans at the same time. I only use one per computer and it makes a big difference.
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