2. The 15km transmission length can only be attained underneath the FCC normal when measured in an out of doors atmosphere with out interference. The SRRC conventional is adopted in mainland China, as well as the furthest transmission length is eight km. Mavic 3M with RTK module for centimeter-stage positioning. https://m3mhomes.com/residential/m3m-opus-at-m3m-merlin-sector-67-gurgaon/