2. The 15km transmission length can only be obtained underneath the FCC normal when measured in an out of doors environment without interference. The SRRC conventional is adopted in mainland China, as well as furthest transmission length is 8 km. Mavic 3M with RTK module for centimeter-amount positioning. Flight Handle, https://m3mhomes.com/dwarka-expressway-project-will-be-completed-soon-gadkari/