Firstly, I was not able to buy the less expensive, blue one; but was able to buy the more expensive brown one, for some reason. Then, the fans take daaaayyyyyyssssss to charge to 100%, not hours, literal daaaayyyysssss. Not worth it. Only for it to die within hours later. It probably might last the 12 hours on the low first setting, but definitely not the 4th. Which u have to literally sit right in front of the fan to even feel it. And on top of that, it shuts off and dies, even when plugged in!! Totally worthless!! How can it not even work WHILE plugged in?? Don't buy!!