The WV 1 Plus D500 Window Vac from Kärcher ensures streak-free, clean windows, and also saves lots of time and effort. The intelligent combination of spray bottle and wiper guarantees extremely effective cleaning. The handy device then has no trouble vacuuming away the water from the window with no dripping dirty water and no streaks. When compared with conventional methods, manual cleaning is noticeably easier and three times faster than before.