💨 ELUTENG Dual 120mm USB Fan: Portable 5V Ventilator for Laptop, Desk, Receiver, DVR, PlayStation, Xbox & Cabinet Cooling Review

I use this as a greenhouse fan. It still works. I have a cheap ($20) truck solar panel that runs on fans. hope it lasts I liked that it was easy to assemble.

They blow a lot of air and are virtually silent - amazing! The lower temperature allows me to start my computer 20% faster. (I use a motherboard temperature sensor to protect hardware with a Threadripper3970x CPU and two RTX 2060 GPUs - to train a neural network.)

I have a few pairs of these fans and also a pair of 80mm electronic coolers. LCD screen Sony Bravia. The 80mm fans sit behind my PS4, Switch, and Wii U. On the rare occasion that I fire up an XBox One, I simply move the 80mm fans on the shelf to where the XBone is. I don't know the exact number. Fans in terms of the amount of air they move, but it seems to me that smaller fans force more air but obviously don't cover as much surface area. The fans don't help my TV much which I expected. They…

These are great fans I place behind multiple external hard drives to keep them cool what happens! According to the sensors my computer sees, it's keeping the temperature about 12 degrees cooler.

The fans are very quiet. But . First, 2 fans are connected. I can't put them on two different shelves, the connected cable is too short. Second, the performance of the fan is so weak that I can't tell which way the air is blowing, or is it because they are blowing from both sides. Third, there is no temperature control, it just blows at any room temperature.

I use them to cool my modem, router and other IoT hubs. Very quiet. The device is in the closet. There is no sound when the door is closed.