Technically, it's a water fed hose fed pole, pump fed, fed by electricity. The pole never get's fed, only the hose, which feed's the brush head jet's at the head of the water fed hose fed poll, using water as the feeder of the fed stuff. Not any old water mind!! this is special water, what only us Window Cleaner's and some Scientist's know about.
The van is to put it all in so you can take it to your custies house and squirt it at the glass then run away before it dries well clean, unless your special water isn't working properly, or you didn't pass a self certified window cleanery exam, then it dries well spotty.