The link in the first post is just to show an alternative way of extending the pole if you have the room. The second link is how it works in normal use. It is a lot easier than a pole with clamps, to use in an enclosed space like a garden.
Reported time savings of at least 30%, fits in a small car or van. Extends enough to clean conservatory roofs, and closes small enough to clean bottom windows, so no changing poles.
I could go on but I won't.
£159.50 including an Autobrush.
Peter