Two. The 15km transmission length can only be achieved beneath the FCC conventional when calculated in an outdoor atmosphere with no interference. The SRRC regular is adopted in mainland China, as well as the furthest transmission distance is 8 km. Mavic 3M with RTK module for centimeter-degree positioning. Flight Manage, https://m3mhomes.com/the-grand-property-sell-fest-by-m3m-smart-world-top-developers-may-16-18-2025/