The GF-500 device works on the long distance sensing system (LDS), the advanced and built-in with acoustic identification systems to locate the path and point center of target. The GF-500 offers the high rigor frequency waves that enable it to identify and detection the target location underground, like a diamonds and gemstones meticulously where the device can locate the targets from 200 meters distance and an angle of 360 degrees with precise control feature at a horizontal distance search, where there are a several levels of search distance, the user can adjust according to their needs to the horizontal scan, the search depth in the GF-500 device can be reach until 10m underground with the possibility of precise control in search depth.