... -charging Function,Mop function Virtual Wall i ROBOT ROOMBA AUTOMATIC VACUUM CLEANER SYSTEM COMPLETE SET NEEDS NEW BATTERY Main Function:Specification : ... robot vacuum cleaner. (Optional,not free of charge)4.The mopping, which is made of high fiber, is with high absorbability of water ... color: red,black, purple,blue,green i ROBOT ROOMBA AUTOMATIC VACUUM CLEANER SYSTEM COMPLETE SET NEEDS NEW BATTERY