Cleans 3 times quicker and requires less effort than with power towels or regular squeegees. Water and cleaning solution help loosen dirt off the windows. Then use the tool to suction the solution off the window. Helps prevent dirty water drops or streaks from being left behind. Able to clean other smooth household surfaces not just windows. LED display integrated into the on/off switch. Display will change to red when the battery needs to be recharged.. Includes glass cleaner concentrate and a charger.