The WV 50 Powersqueegee is one of those tools that you don't necessarily need but when you have it you appreciate it. It does more than just help you clean windows, it can suck up spills and dry just about any surface. The advantage to using it on windows is that generally it doesn't leave streaks. It sucks up all the liquid into a drain-able tank and is rechargeable. Our unit came with a case, replaceable blades, a charger, sample of window cleaner, spray bottle and cleaning cloths.