O2COOLTreva 10 inch Rechargeable Portable Fan Smart Power Air Circulator. Plug-In AC Adapter and Battery Powered, USB Charging Port, For Camping Travel and Indoors Use

Very convenient that it is rechargeable.

I decided to buy this to take on future trips to Europe. It is extremely hot in Europe regardless of the season. The trains are very hot winter and summer. The hotels are hot and many don't have air conditioning, or they refuse to turn it on even when it is really hot. I've found that even when it is 60 degrees outside at night, opening a window offers little relief, because the cool air doesn't come into the room. So I wanted a fan that was small enough to use on a train, or perhaps even an airplane, but large enough to assist in bringing some cool outside air into a hotel room.I haven't taken it to Europe yet, but I've experimented with it at home and this fan looks like it will be perfect for my intended use. It is dual voltage, which means I can just use a plug adapter and use it in Europe. It provides a reasonable amount of wind force; certainly all I could expect from a 10" fan. I've charged it and then let it run until the batteries discharged, and it ran for quite a long time, although I didn't measure it. I doubt I will use the backup D-battery capacity often, but that is nice to have. The legs are easily removable, and this fan fits easily in my eBags TLS Mother Lode Weekender Convertible (Solid Black), which I take onto planes to hold my computer and electronics plus a change of clothes. For what it's worth, the fan will stand up without the legs, and that might be how you would want to use it on a plane or a train.I think this is the most expensive O2 fan because of its use of three power sources; the fan will automatically use the "cheapest" option, first plug power, second the internal battery, and third the D batteries to run the fan. This can be a pretty good thing. The USB port is only for charging things like a phone; you cannot charge the fan through the USB port. The inner fan unit has almost unlimited vertical tilt ability to allow one to adjust the direction of the air flow. I checked the weight using my bathroom scale, and the listed weight of 3.4 pounds looks about right; without the power adapter the weight is about 2.5 pounds.A couple of reviewers have complained of a lack of quality; I did not find this to be a problem, although this is a plastic fan and I can see how there might be some quality control issues; it seems quite sturdy to me. I have seen complains about other O2 fans that the battery will not charge, and it certainly will not charge when the fan is in the "OFF" position, only in the "STOP" position. I think this fan has an automatic shutoff, but with battery operated devices, once the battery is charged you should unplug it as overcharging the battery for an extended time will ruin it. Also, when buying this for occasional use as I did, you should take it out every couple of months and run it until the battery discharges completely and then charge it up again, as this will maintain the battery; don't just "top it up."Having left my glowing review of this fan, I should note that the current price is substantially more than I paid. What seems to be an identical fan, O2COOL 10-Inch Portable Smart Power Fan with AC Adapter & USB Charging Port, is being offered with Amazon Prime shipping. Since I believe these fans to be absolutely identical, everything I said about this fan applies to that fan. Just choose the fan with the lower price.

Hoping to get lots of quality cool air flow for our dogs in their crate while driving our motorhome. I got 2 of these to run together on the floor outside their crate...angled at them.

Bought this fan for our RV. Finally got around to using it. Fan is acceptable when plugged in.Fully charged the fan for overnight use. 1st time on a that charge the fan lasted 5 hours on low setting. 2nd time fully charged, fan lasted 15 mins on low setting.Needless to say I'm extremely disappointed with the rechargeable battery life.We have another O2 cool of same style fan, worked great for years until the rechargeable battery finally won't hold a charge. O2 cool fans are superior to this fan.

One of my BEST purchases, ever. Bought it a few years ago, use it all the time (using it right now, haha), and it still works great! Well made, built to last. Love the different speeds and the rechargeable batteries, makes it very easy to take wherever I want. It is the perfect size for a small apartment or bedroom, keeps me nice and cool, I just LOVE it. Highly recommend.

We glamp camp in our LQ horse trailer often and sometimes at places where we aren't permitted to run our generator at night. I bought this fan for the occasions we need to sleep with our windows open and it fits and sits perfectly in the windows of the bedroom in our horse trailer (without the legs). It is much more powerful than I expected and even makes enough of a white noise fan sound for me to sleep with it on the low setting.My only complaint, is the fact you can't select which power method you want it to use. It automatically will be powered by the AC adapter if it's plugged in and if not, it then changes to the internal battery, if the internal battery is dead, it will then change to the 8, D alkaline batteries (which aren't included).I do feel it is overpriced for the quality, it is very difficult to get the D batteries in and out and you feel like you might break it in the process. OVERALL, I would purchase it again, simply for the fact it allows me to get sleep when I otherwise, would not.

Works great. Rechargeable. Makes staying cool a breeze!

This fan is the envy of all who see it when I take it ti camp in the summer. It is quiet, but has a significant cooling breeze. As someone who overheats easily, this is a godsend! I love that it can be charged or use batteries. Wonderful product!