Review on Yeslike Portable Air Conditioner 2021: Rechargeable Evaporative 90° Oscillating 3 in 1 Mini USB Fan, Sterilizer, Humidifier - White by Karla Richter

I have a small caravan (Jayco 154BH). We often go to places where there is no electricity, so I needed something to help us stay cool when we couldn't turn on the air conditioning. We live in southeast Washington state where temperatures often top 100 degrees at this time of year but humidity is low. I did a test with a trailer parked in the driveway. I charged the device overnight and soaked the water absorbing curtain. I filled the tank with tap water, placed it on the dining table in my trailer and turned it on full blast. It definitely made for a cool breeze. It ran 3-4 hours on a single charge and it runs while charging so I can run it from a 12V USB port the whole time. It's pretty quiet too. My only complaint is that it didn't affect the 97 degree ambient temperature inside the trailer.