Two. The 15km transmission distance can only be obtained under the FCC conventional when calculated in an outside environment with no interference. The SRRC conventional is adopted in mainland China, and the furthest transmission length is eight km. Mavic 3M with RTK module for centimeter-stage positioning. Flight control, the camera, https://m3mhomes.com/commercial/smart-world-one-dxp-street-sector-113-gurgaon/