Easy to use: just fill the robot with water or Scooba Hard Floor Cleaner, press "Clean", and Scooba 390 does the work for you. Wide cleaning head makes Scooba 390 ideal for kitchens and other large areas. One full tank washes up to 425 square feet before it requires refilling. Makes at least three passes over every area for thorough cleaning. Wall-Following technology ensures the most thorough floor coverage possible. With the Scooba 390 you get high-performance floor scrubbing, for even in the hardest-to-reach spaces of bathrooms and kitchens. It cleans tile, linoleum, and sealed hardwood floors using a four-stage cleaning process that neutralizes up to 98% of common household bacteria – no sweeping required. It does all the hard work for you.. . . . . Cliff detection sensors allow Scooba to avoid stairs and other drop-offs. Includes rechargeable battery, battery charger, virtual wall, suction bulb, 4 packets of Scooba Hard Floor Cleaner. One-year manufacturer's limited warranty on robot; six-month limited warranty on battery.