The Roomba Combo j5 robot vacuum & mop is designed for both wet and dry floor cleaning-converting from an all-floor vacuum to a hard floor vacuum & mop, with the simple switch of a bin. Just pop in the Roomba Combo Bin and your robot will automatically detect it's time for a combination clean. Spend less time worrying about your floor and more time in control of the clean you want. The innovative thinking you've come to expect from iRobot, now gives you double the clean with one machine.