Whats this and how does it work? If its anything to do with less effort when washing/detailing, count me in

It's like a super soaker water gun.
You fill it with whatever cleaning solution, close the lid, pump the lever (which I guess pressurises the container) and press the trigger. You get a continuous stream of solution for as long as you hold the trigger.
Gotta be better than using a standard spray bottle and having to squeeze the trigger multiple times.