5V Powered Electronic Cooling Fan with Speed Controller 2X 120mm Computer Fan for Router Modem Xbox DVR Playstation Receiver Cooling

So, I used a small fan, about 1/4 of the size of the Qirssyn fan, to cool my work computer. My office faces the west so my office and work computer gets hot during the midday. The small fan was doing a decent job, but I was not too fond of a few things about the smaller fan. The main issue was that it wasn't USB-powered, and since I use a standing desk converter, I needed an extension cord to reach the plug (I'm 6'1). The length of the cord from the controller to the fan was too long, and the controller was as big as the fan itself. Although it provided strong airflow, the air distribution was minimal and didn't cover the whole surface area since it was a small fan.The Qirssyn fan is oversized for the mini desktop I got from work. It is wider than the computer, so I placed two wood pieces on both sides of the computer as a base for the legs. The fan comes preassembled, but I wanted to blow air towards the leg, so I had to disassemble it and flip it around. I like that this fan is USB-powered and has low, medium, and high settings. I initially thought the air was not blowing as strongly as my smaller fan, but I was wrong. It provides strong airflow and distributes the air sufficiently to cover the whole surface area. My computer is a lot cooler and running smoothly now. I also like that it is completely black, even the metal guard. This fan is exactly what I was looking for.

4.5 stars. Good construction and works well as described. Efficient; ran for hours on a USB backup battery.

When camping without hookups, we run our trailer refrigerator on propane. Normally we avoid traveling to camp in the heat, but sometimes the heat finds us. The fridge sometimes struggles when the temperature gets above 90 degrees. Opening the outside vents behind the fridge improves airflow and lets some of the built up heat escape. I've acquired a small portable solar powered fan that will help blow out the hot air and improve cooling circulation, it only works when the solar panel is in the sun.So this compact set of two 5V Powered Electric Cooling Fans is my ace in the hole. We already had the little cell-phone style back up battery pack, so I plugged the fans in, they worked just fine.At about 10"X5"X2" the fans are easy to fit and aim in the fridge vent area, which should aid in circulation and cooling so the fridge doesn't have to work so hard. Unsure of how long they'll run on a small battery pack, but if I can get a few hours of cooling at the hottest part of the day, that does help.

The fans mounted easily in a generator enclosure. They are providing airflow to prevent the build-up of exhaust gasses and heat, which they are doing very well. The generator has an external exhaust pipe, but there is always some leakage, plus the cool air brought in from the vents keeps the heat from building up too much. We've not had to use the generator more than a couple of hours at a time this season, but the fans have done their job so far.

Used for pushing or pulling air depending on which side is "up" since the feet get added when you are ready to use it. Devices can sit on top of this or it can sit on top of devices, again depending on which was you want to move the air. I think it is really best used in confined spaces to help with air movement or when noise sensitivity is high since you have three speed settings which help with this a lot. Used for router, NAS, ONT, small cabinet, etc...

For my home, I run two small servers that are installed on small form-factor computers (Intel NUC style PCs) to serve up some videos, pictures, and home automation services. I keep these servers in a closet on the top shelf, which means that in the summer, it can get quite hot.To resolve this issue, I needed a cooling system that's a bit more beefy than the small laptop fans built in to these computers. An external cooling fan was necessary.The Qirssyn 5V Powered Electronic Cooling Fan was perfect for my needs. It's wide enough for both of my computers to sit on top of it side-by-side. The fan has its own speed controls and effectively blows the air upward into the computers to keep it cool.I use this fan as the cooler for the bottom, but on top of my computers, I actually have another set of smaller USB fans to pull the air upward. The two fans are able to power from a single power brick connected to the wall.With two sets of fans, I can run them on medium to low speeds to reduce the noise.Overall, this fan is exactly as I expected. It is well made and the metal grills and raised legs gives great airflow and I'm confident that my computers are well cooled.

I selected this product for a slightly non traditional use - I need to add ventilation in a 2 story shed to push heated air from the lower level upstairs. This dual fan setup works perfectly. I cut a rectangular hole in the corner and secured this fan unit over the opening. I picked up a 5v solar panel on Amazon to power our during the day. It is exactly what I needed! I highly recommend, it seems to be quite durable and moves quite a bit of air even on low.

This fan cooler is working great for cooling down RC Planes Li-Po batteries after each flight. This has help in keeping the batteries from puffing up when I have discharge them down to the minimum rating. I try and keep them at 30% but every now and then I get them down to 14% which brings them in hot. This helps in cooling down the batteries way faster then just in the open air.