Lawnmower robots are getting smarter all the time. Take the Novabot for instance: it is an autonomous lawnmower robot with cutting height of 20mm-70mm that can overcome slopes up to 45 degrees. It is IPX6 waterproof and doesn’t require a perimeter cable.
This robot comes with a smart computing chip, HD panoramic camera, and a millimeter radar sensor. It is smart enough to detect and avoid foreign objects. It has an adaptive cutting deck and uses off-road tires to overcome rough terrains. According to the manufacturer, these robots have a noise rating of < 60dB.