2. The 15km transmission distance can only be reached beneath the FCC standard when measured in an out of doors atmosphere with out interference. The SRRC typical is adopted in mainland China, as well as the furthest transmission distance is 8 km. Mavic 3M with RTK module for centimeter-amount positioning. https://m3mhomes.com/m3m-smart-worlds-big-billion-biggest-property-sale-2024-pay-24-now-nothing-till-possession/