The Rayfinder is a digital long range antenna with which you can scan an area similar to a normal dowsing rod. You can determine whether gold, silver, diamonds, copper, water, metal, and much more are present in a certain area. With the Rayfinder you can, for example, scan a field of approx. 300 meters in length for your desired target objects, whether they are there ?! The maximum range is approx. 2100 meters The maximum depth range of the Rayfinder Long-Range Antenna is approx. 8 meters.