I do not believe that air is enough when its pouring very hard

IT REQUIRES HUGE BATTERY FOR THE HIGH POWER WIND

The principle could probably work, but I'm not sure you'r be able to pack enough punch in that small format. I sure wouldn't want to depend on the batteries not running out to stay dry, and it doesn't even take less space than a conventional umbrella. But what the heck, as long as I can hook it up to my smartphone.....

If it works, it's probably noisy. These images however looks very fake.
#4 Shouldn't this thing blow the water droplets away??