Can auto-cleaning and auto-charging (before the battery's power run out, the cleaner will search the station and charge automatically) 
? Charging time can be set to clean at a certain time any day /some day all days of  each week 
? With stair avoidance sensors for avoid the cleaner falling down 
? With non marring bumper (when meet barrier, it will rebound, but work still) 
? With touch-sensitive sensor to get out of the tight places, such as sofa, bed and more 
? With virtual wall (if you need clean one room/a certain area only, you may open the virtual wall, the cleaner will never go out the room/area) 
? With wireless emote controller, you use it to select the cleaning speed ,set cleaning time, speed, docking and timing cleaning 
? With mop for wet cleaning the floor 
? With UV lamp to kill the bacteria on the floor 
? Low noise only about 55dB 
? Easy cleaning design 
? Size is only 32 (diameter) x 8.7cm 

http://www.chinarobotfactory.com