The Russian Khabarovsk-based NeuroPVO laboratory has developed and tested a prototype of the Kupol 25, a home-made autonomous air defense system designed to destroy drones. The project is being developed by a small team, without government funding or other assistance. The Kupol 25 air defense system does not use radar; drones are detected by cameras and, using neural network algorithms, the weapon is aimed at the target. The team is currently finalizing the system's software. The weapon is a pneumatic cannon firing metal balls. A diagram of the system is shown on the screen. Currently, the system is capable of destroying drones at a range of up to 25 meters. The Kupol 25 system costs only 230,000 rubles (US$3,200), and the cost of destroying a drone starts at 70 rubles (US$1). The developers themselves explain the operating principle of the Kupol 25 system in a video.