Visual smart navigation - The visual camera scans the room and clean with full home plan route,then built a cleaning route map. Create boundaries/invisible wall/setting a restricted area:just draw a line on the map to avoid machine to the area Breakpoint resume operation:After charging or position moves, the machine will return to the breakpoint and continue to clean the remaining area. Wet vacuuming Intelligent water tank : its Intelligent electronical water tank for this model,control water flow through APP stop water when machine stop, or in charging station.