6 In 1 Multifunctional Intelligent Vacuum Cleaner Auto Vacuuming,Sweeping,Sterilizing,Mopping,Air Filter,Avoid Falling Down,Avoid Bumping,Timing Cleaning,LCD Screen,Touch Button,55dB Low Noise,Full Go,Speed Selection,Space Isolator,Auto Charging,Remote Control,Scheduled Cleaning Features ofVacuumCleaner Robot :1. Automatically cleans your floor without any hand labor while you enjoy life, you can preset working time, working/rest days.CERTIFICATE of Robot Vaccum Cleaner: