Ambrogio Twenty ZR .25 acres Wire freeThe technology that revolutionizes lawnmower robotics Twenty ZR is the brand new, simple, compact, lightweight, powerful, and fast robotic mower, which does not require installation of perimeter wire. The robot is equipped with the most innovative technologies, which allow it to manage and map the garden by learning its characteristics. ZR technology integrates artificial intelligence systems with radar sensors, allowing the robot to detect grass,