... cleaner you can easily clean the bottoms of the furniture;it is lower then 50eb, when the noise is more then 70db, ... say the control of the cleaning robot wont be effect by the obstacles, as the wall ,the furniture, etc, so you can control the clean ... function, when the sensor test the obstacle.it will be pass by automaticlly, avoiddamaging the furniture*Auto-rechage system ,when the battery is ...