2. The 15km Transmission distance can only be realized under the FCC conventional when measured in an out of doors surroundings without the need of interference. The SRRC common is adopted in mainland China, and also the furthest transmission length is eight km. Successful aerial surveying must see the invisible. https://m3mhomes.com/new-isbt-to-come-up-on-15-acres-off-dwarka-expressway/