It has a more safety structure, perfectly fixing method of the front wheel and motors. The bright selling point is the bump sensors, pressure sensors and lift sensors which are fasten on a rocking bar. A subarea setting function could separate a big area into 3 small areas at most. With this kind of high cutting efficient setting, it saves much time of robot running at same place, to cut a big lawn with lest time.Have lift sensor,tilt sensor ,ultrasonic sensor,bump sensor,rain sensor,touch sensor,mowing schedule,anti-theft function,wireless remote controller