This makes cleaning smooth surfaces child's play. With the KV 4 rechargeable wiper including electrical water discharge and vibration function, dirt can be removed from the surface without scrubbing. The remaining liquid can then be vacuumed off without streaks or drops with the WV 6 cordless window vacuum cleaner. The WV 6 convinces with an extra long battery life of 100 minutes and a flexible suction lip for cleaning surfaces in a single pull - ideal for surfaces close to the floor and streak-free window edge cleaning. The KV 4 also comes with a 2nd wipe, 4 x 20 millilitres of cleaning agent, a charger and other extras.