S400E has industry-leading relay networking technology, support “One-Control -Two” (one remote controls two drones), “Two-Control-One” (two remote controls one drone) and “Star Networking” (multi-UAV linkage networking) modes. In the face of long-distance&obstacle crossing, such as mountains, buildings, and even areas without network, one piece of S400E drone is enough for signal relay, which can break through the operating boundaries of conventional drones and easily deal with complex terrain