Review on 🔋 O2COOL Treva Portable Battery Operated Fan - 10 Inch Blades - Smart Power Air Circulator for Camping, Travel, and Indoors Use - Includes AC Adapter, Rechargeable Batteries, and USB Charging Port by Adam Jackson

We often camp in our LQ horse trailer and sometimes in places where we are not allowed to leave our generator running at night. I bought this fan for when we need to sleep with the window open and it fits and sits perfectly in our horse trailer bedroom windows (no legs). It's a lot more powerful than I expected and even makes enough white fan noise for me to sleep with it on low settings. My only complaint is that you can't choose which energy method to use. It will be automatically powered by the AC adapter when connected, and if not, it will switch to the internal battery, when the internal battery is low, it will be replaced by 8 D alkaline batteries (which are not included) . that it's overpriced for the quality, D batteries are very difficult to put in and take out and you feel you might damage them in the process. Overall, I would buy it again simply because it lets me sleep when I wouldn't otherwise.