The WV 2 is quieter, more maneuverable and more powerful than its predecessor. The reduced construction height makes vacuuming lower sections of the window easier, without hitting the window sill. The on / off switch on the outside of the handle can be operated conveniently with the thumb. The air slots on the casing have been removed for a softer overall appearance. The shape of the spray bottle has also been improved. It is more portable and can be safely stowed. An extension kit, among other accessories, is also available. Cleaning tall or high-up windows is therefore easier and safer.