Two. The 15km transmission length can only be achieved beneath the FCC conventional when measured in an outside environment with no 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. Flight Manage, https://m3mhomes.com/residential/m3m-xpressway-114-sector-114-gurgaon/