Two. The 15km transmission length can only be achieved under the FCC conventional when calculated in an outside atmosphere without interference. The SRRC conventional is adopted in mainland China, as well as furthest transmission length is 8 km. Mavic 3M with RTK module for centimeter-amount positioning. Flight Regulate, the camera, https://m3mhomes.com/why-m3m-iconic-business-tower-gurgaon-is-the-ultimate-business-destination-on-dwarka-expressway/