Corner-cleaning 'D' design - round robots can't reach corners, and corners are where the worst dirt hides. Our industry-leading design gets you a complete floor cleanLaserSmart mapping - D4 technology intelligently navigates and maps your home, cleaning in straight lines instead of a random pattern -- so you never miss a spotMasterful on multiple surfaces - Neato D4 conquers any surface, from carpet, to hardwood, to kitchen tile.Intuitive operation and interface. Neato is simple to use. Our focus has always been on out-of-the-box, one-button, perfect cleaning.Clean winner in innovation. Get laser navigation, no-go lines, 70% bigger combo brush, smart-home interaction, app support, and most of all. . . real, autonomous, robotic vacuuming!