Features Anti-scratch tempered glass cover for protection, infrared-sensor for evading obstacles, and drop-sensing tech to avoid falls. Recharges automatically. Real-time recording of walking coordinates for wall or furniture to turn direction in advance. And you can builds simulate infrared wall to keep your cleaning sweeper out of certain places. value Equipped with V-shaped tangle-free rolling brush, 0.3L water tank and also a anti-scratch wire drawing process metal cover, providing 3-in-1 cleaning Sweeping, Vacuuming, Wet/Dry Mopping. Automatically adjust suction strength to carpeted/tile/hardwood/laminate floor, avoid bumping around, stair and drop-offs, automatically return to work from pause when recharged The robot will go where no vacuum has been before. Keep dust & dirt in check under beds, sofas and other hard-to-reach places. With only 2.8in/7.2cm in height and it will leave no nook and cranny untouched.Warranty Service and provide one-year warranty for the whole machine. If you have any after-sale problems, please contact our after-sale service team, the contact way as below