Two. The 15km transmission distance can only be accomplished under the FCC regular when measured in an out of doors environment devoid of interference. The SRRC normal is adopted in mainland China, and also the furthest transmission length is 8 km. Mavic 3M with RTK module for centimeter-level positioning. Flight https://m3mhomes.com/residential/m3m-golf-hills-sector-79-gurgaon/