The main G20 is an underground visualization system that detects differences underground and allows for 3D analysis. It enables the detection and determination of the location of metals, magnetic objects, and hollow structures such as graves, rooms, and tunnels buried underground. Depending on the size of the target and soil structure, it can reach depths of 10-12 meters. The Glavny G20 is designed to be extremely simple and compact so that anyone can use it. Thanks to its lightweight design, the user scans the area, and the data obtained during the scan instantly appear on the screen of a mobile device, such as a tablet or Android phone.