Stair Avoidance Detector assure the unit won't drop from the stairs and table.
It will escape automatically by itself when it was stuck by the furniture bottom or something else
UV light sterilization kill most bacteria and viruses of the floors. 
A mop can be installed on it to improve the cleaning efficiency. 
Virtual Wall Detector make sure the cleaner work at the confirmed area which you want to clean.
Wall Following Sensor make sure this unit can clean most ground surface along the wall.
The walking speed can be adjusted as you like.
Self-adjusting cleaning head automatically traverses uneven floor transitions as it cleans carpet,
Hardwood, linoleum, and tile.

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