Instructed by the Kress RTKn network, it navigates your lawn with centimeter-level accuracy. No need for boundary wire or fixed reference antenna to be installed on the lawn. The bullseye navigation algorithm ensures accuracy where lines of sight to the satellites are blocked by trees and buildings. Operated by the MAP™ (Mowing Action Plan) technology, it can maintain each zone independently and efficiently manicures lawns up to 1¾ acre large.