People who hate housework will soon have two more robots to handle the chores. At 3.5 inches high and 6.5 inches wide, the 230 is geared to squeeze into tight places, such as underneath furniture and around bathroom fixtures. The 230 holds enough cleaning fluid to take care of 150 square feet of space in one session, iRobot said. The Scooba will also incorporate iRobot's Virtual Wall technology, which sends out a beam the device won't cross, ensuring that it doesn't stray out of its assigned cleaning area. The Roomba 700 series is the sixth generation of the robot cleaner, according to iRobot, and has been designed to vacuum up smaller, finer particles.