robot vacuum cleaner helps you clean your floor without any hand labor while you enjoy life! This model has 4 cleaning functions including Sweep, Vacuum, Dry Mopping and Sterilize , it can easily handle various surfaces including hardwood, tile, linoleum and low-pile carpets. The operating noise is no more than 50 dB, which is significantly lower than the traditional cleaners. With its sensors, the cleaning robot can free itself when it is got stuck by the bottoms of the furniture and by other articles. When low on battery power, robot vacuum cleaner will automatically return to home charging base to recharge itself. Virtual Wall Detector makes sure the cleaner work at the designated area where you want. Plus, with on-board scheduling, robot vacuum cleaner can be scheduled to perform up to seven cleaning sessions per week, even when you're not home.