Two. The 15km transmission length can only be reached beneath the FCC standard when measured in an outdoor surroundings without the need of interference. The SRRC normal is adopted in mainland China, as well as the furthest transmission length is eight km. Effective aerial surveying has to see the invisible. https://m3mhomes.com/why-m3m-iconic-business-tower-gurgaon-is-the-ultimate-business-destination-on-dwarka-expressway/