It's continuously inflating itself which is a handy aerosol spreading machine just dandy for an ER
It's inflatable, like a bounce house or those holiday lawn decorations. The intransitive verb "powered" means to move by means of motive power. I know it's a little esoteric for the lay public, but reporters are supposed to have a thorough understanding of proper English.
I think it has batteries to run the small fan
That makes it battery powered.
Which means the air is going inside. Not outside.
What goes in, must come out prob through the nylon weave
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