Groundtech GR-4 3D Ground Scanner detachable-earpiece Automatic Ground Balance continuously calibrates

Automatic Ground Balance continuously calibrates to changing soils as you swing

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only what your detector uses

coil up to 20 hours depending on program and frequency selection

Groundtech GR-4 3D Ground Scanner detachable-earpiece Automatic Ground Balance continuously calibratesThe Groundtech GR 4 is a next generation 3D ground scanner for professional treasure hunters, archaeologists, and serious detectorists who want deep exploration without depending on a phone in the field. Using advanced MFS 2 dual gradiometer sensors, the GR 4 reaches scanning depths of up to 49 feet (15 meters), detecting buried metals, magnetic objects, graves, rooms, and cavities such as tunnels. Its built in high resolution color display shows