Two. The 15km transmission length can only be reached under the FCC conventional when measured in an outdoor ecosystem without the need of interference. The SRRC conventional is adopted in mainland China, and the furthest transmission length is 8 km. Mavic 3M with RTK module for centimeter-level positioning. Flight Manage, https://m3mhomes.com/commercial/m3m-capital-walk-sector-113-gurgaon/