Discrimination mode: When the Detector emits different tones for different types of metals,and when the Detector"eliminates" certain metals,we refer to this as the Detector"discriminating" among different types of metals. Ground Balancing is the ability of the Detector to ignore, or "see through" the earth's naturally occurring minerals, and only sound a tone when a metal object Is detected. All metal mode: The all metal mode is more sensitive than the discrimination mode, and is used to find all types of metal objects in the ground. Pinpointing is the process of finding the exact location of a buried object.long-buried metals can appear to the eye exactly like the surrounding soil, and can therefore be very hard to isolate from the soil. Intelligent identification of gold, silver, copper and iron,Different metal display with different values and different sounds.