Groundtech GR-3 Plus | 3D Ground ScannerGR 3 Plus; is a ground scanning detector that detects differences under the ground and allows you to make 3D analysis. It enables you to detect, measure, and locate buried metals, magnetic objects, and cavities such as tombs, rooms, tunnels. It graphically displays magnetic (iron or steel) and non magnetic (gold, silver or copper) metals through its specially developed 3D analysis software. Different Scanning Features Extremely simple and compact