Hi. It can't fall down stairs, because of the sensors. It will stop 1-2 cm before the ledge and reverse. Unfortunately it can't climb them either. The robot will "scan" your house the first couple of runs going room by room and recording it all on the app. In the app you will have a map of your floor and the areas will be divided into zones. You have the option to select which zones it should or should not clean. It also does spot cleaning, where you select just 1 spot to clean.
Answered by: MatthaeusZ