Impact metal detector has 12 preset modes for searching. Each search mode includes different setting and value that matches with the objective and practical application. You will find that one of the searching modes can be used for searching at a deeper depth and some other search modes are suitable for searching for very small targets, such as precious metals, iron, etc. The search modes in the Impact device can be detailed as follows: All metal search mode GEN All metal with an audio discrimination GEN (D) Two-tone discrimination mode- DI2 Three-tone discrimination mode -DI3 Four-tone discrimination mode -DI4 Multi-tone discrimination mode -DI99 Conductive ground mode – COG Deep search mode – DEEP Coin search mode with noise reduction – VLX1 Relic search mode – VLX2 Static search mode without movement of the coil – STA Static search mode without movement of the coil with an audio discrimination STA (D)