Mammotion has announced LUBA, its first wireless robotic lawn mower. The all-wheel-drive robot can mow an area up to 5,000 m² (~53,820 ft²) between charges. Four sensors give the gadget a 220° field of view, and an RTK system enables the device to plan the most efficient route.
https://www.notebookcheck.net/Mammotion-LUBA-wireless-robot-lawn-mower-with-ultrasonic-sensors-launches.621660.0.html