Been wanting this for a while now but wasn't prepared to pay $48 for it. It has an adjustable lance to extend the reach, has a rounded head to save you from bashing your car with the edges of the brush head and can be plugged up to a hose to blast off those bubbles! Its a good quality brush, shouldn't scratch or swirl your paintwork up.
This is the cheapest I can find worldwide at the moment.
I bought something similar only a week ago, from bunnings.. $30 normal price. Connect hose at the handle end.. the handle is adjustable from about hmm just under 1 meter.. to about 1.8 meters (my guess) has a on/off thing on the handle.. and very soft bristle brush.. not sure if this bigw one has any extra features.