O2COOL® 5-Inch Portable USB Fan, Grey

This is exactly what I needed while living full-time in my class A RV, where periodically our power may go out in the summer. The 2 options for power is perfect, where you get more power when using the battery than you do when using USB electric, something that turns the 2 speeds into 4 speeds that are pretty quiet white noise sounds. I keep it on my small bedside table in my rv, which fits perfectly, and of course I can take it in my purse, as well.So glad I got this, will update if it fails within a year.

I've bought several of these fans over the years. I use it at the breakfast table to cool off after exercising or working outside. It would also be very good for a desk or work station. It is relatively silent, moves a good amount of air either in low or high speed, and is very efficient; I use rechargeable batteries, and get about 6-8 hours of use out of one set. Alkaline batteries would probably last longer, but obviously cost more in the long run. I like the fact that it folds up and doesn't take up a lot of room when not in use. As my review title said, it's a personal fan; don't expect it to cool off a room. It works great when it's setting 2-3 feet from you and you enjoy having air moving around you.

I’m always hot! So when I saw this fan at CVS earlier in the summer I bought it and was so pleasantly surprised when it was quiet and powerful! Runs well even when the batteries are almost drained. I also use an external USB battery for added life.Fan folds perfectly, the USB power cord is a decent length and it’s a powerful little thing! Keeps me cool outside or inside a hot, humid house.Bought this second fan because it was superior to the 5” white Treva battery powered fan.

Fan works as expected. Switch for it likes to glide past off to high or low, so more positive feedback would improve it. Fan requires 4 batteries to operate without adapter. Unclear as to whether it is running on battery or adapter when plugged in and batteries are installed too.

I took it on my trip to Italy but it doesn’t move very much air and I had it 2 feet from my face. Not a very good fan especially when you have hot flashes.

I've had several of these, and I'll keep buying them even though they only last a couple years.They run for many hours on batteries - I haven't timed them, but I would say about 16 hours.The fan will also run on a USB charger or a backup battery pack with a USB charger - depending on the size of the battery you can get many days of use.Very quiet and relatively powerful for a personal fan.It's not going to cool down a room, but it works great if you just want a little air and white noise for yourself.For the price they're great, but wish they lasted longer.

My MacBook Air runs hot when on a google meeting with everyone's cameras on. I prop up my Mac on an iphone case, and then setup this fan fully open (so at a 90 degree angle) and the air easily flows under the Mac to keep it cool. I haven't see another fan that runs flush to the table, this is perfect for getting under the computer, keeps my CPU fan from working too hard.

I am frequently in need of immediate personal cooling. This fan delivers every time: virtually silent, two settings, collapsable, portable, and fueled by batteries and electricity. Highly recommend. I’m getting another.