The Fisher F11 features three target modes that use pre-set notch and discrimination parameters to target specific items while filtering out junk:Jewelry Mode: Pre-configured to optimize signals for items like rings, bracelets, and necklaces, while ignoring common trash like iron nails or small foil scraps.Coin Mode: Tailored specifically for hunting clad or silver coins while filtering out trash pull tabs and aluminum.Artifact Mode: Ideal for finding historically relevant iron, bronze, or copper relics over a broad target size range.