Before Ground Exper, if you wanted a professional detector designed for treasure hunting that can reach several meters of depth, usually you have to use all metal mode Pulse induction metal with a one meter coil. Sometimes those units can get rid of non corroded ferrous shallow targets, but when you go deep below the soil they get confused and let you dig on iron and junk targets. Ground Exper now offers perfect discrimination. It can easily get rid of small or large iron objects whatever their degree of corrosion is. Ground Exper also makes difference between highly and medium conductive metals (such as mixed metals). It will also display an alert when reaching gold. You can select which metal you want to dig for and which ones you want to get rid of using one of the 5 presets: highly valuable, valuable, gold, ferrous, all metal. In this new PRO version, you can also manually increase or decrease discrimination on 5 levels to make sure you do not miss low conductivity targets.