I bought this to complete the necessary cooling factor when staying in rooms without air conditioning on hot days and it definitely helps! I just have to remember to point the fans at myself and not at something outside. The blades are sealed well which means my skin is fully protected and I also have to remember to recharge them after each use. I think the charge is enough for a couple of hours? depending on how high you run the fan (three speeds). Overall it works great and definitely helps me stay calm, money well spent!