Personal space A/C

[teddybear]

Been looking at advert for different makes of the above. Thought was to have at bedside at home and above over head bed in M/H.USB socket available in both situations
Has anyone tried any of these ,any useful comments?
Thanks

 

[Guigsy]

Anything USB powered is just going to be a fan with a small water supply to humidify the air. "Swamp cooler". They do work to cool the air a little, provided air humidity isn't too high. But by the middle of the night, you end up air in your van that's been slightly cooled but very humid.