2. The 15km transmission distance can only be achieved under the FCC standard when calculated in an out of doors natural environment without the need of interference. The SRRC standard is adopted in mainland China, and the furthest transmission length is eight km. Mavic 3M with RTK module for centimeter-amount https://m3mhomes.com/pm-to-launch-rs-200-cr-renovation-project-of-gurugram-railway-station/