Now with a simplified design and longer battery life, iRobot's award-winning floor washing robot removes up to 98% of common household bacteria so floors get reliably clean with the touch of a button. The Scooba 390 cleans up to 450 square ft on a single battery tank. It uses a powerful 4-stage cleaning system to prep, wash, scrub and squeegee sealed hardwood, tile and linoleum floors. Scooba uses only clean solution (tap water, water and vinegar or Scooba Hard Floor Cleaner, Natural Enzyme Formula) to wash floors. It even cleans beneath cabinet edges, tables, chairs and other hard-to-reach places. The included Virtual Wall® marks off-limit areas. Also includes battery charger, 4 packets of Scooba Hard Floor Cleaner, Natural Enzyme Formula, and a suctino blub for cleaning and prepping the solution tank. This model includes a 12 month limited warranty for the robot and a 6 month limited warranty for the included battery.