While the most difficult aspects of metal detecting have been automated, it is a sophisticated electronic device which requires an understanding of some basic features and metal detecting concepts. If you do not have prior experience with a metal detector, we strongly recommend that you: 1) Adjust the Sensitivity to a low setting in the event of false signals. Always begin use at a reduced OWNER’S MANUAL The Discovery 3300 is a professional metal detector. While the most difficult aspects of met