Thanks to Karcher, window cleaning just got easier, faster & better with the this clever & simple lithium ion powered cordless cleaner. As you clean, it simply sucks the water in, eliminating streaking. Able to be used anywhere, thanks to its cordless design, it would be an ideal tool for domestic windows, conservatory windows, perhaps cleaning a greenhouse in the garden or on an allotment. The power behind this efficient little cleaning machine is a lithium ion battery, which delivers a longer charge than conventional batteries & is more powerful, with remarkably little loss of charge, even when in storage for long periods. With a charge that will run at full power for twenty minutes, the Karcher AWV 50 Cordless Window vacuum will clean 40-60 square metres before a re-charge. Charging takes 3 hrs, a very short time for a battery this powerful. The cleaned up water is held in a small tank with a 100ml capacity & the low weight of 0.7kg, combined with the ergonomic & easy to hold design makes it very convenient & comfortable to use. With a working width of 28 centimetres, it is a window cleaner but it will clean any glass surface, shower screens, glass cabinet doors, mirrors, shower screens as well as tiles or other flat surfaces.