DJI, the world’s biggest maker of consumer drones, this week launched a US$10,000 enterprise flagship model, the Matrice 400, with extended flight time and an obstacle-sensing system to avoid buildings, mountains and high-voltage power lines at night. The new enterprise drone offers a 59-minute flight time, a payload capacity of up to 6kg, and a powerful lidar and mmWave radar-based obstacle-sensing system that makes this a versatile drone for applications such as emergency air response, power...