Catalog » By Manufacture » Fisher Fisher F-11 $159.00 Short Description3 Modes of Operation: JEWELRY, COIN, ARTIFACT 9-Segment Visual Target-ID 4-Tone Audio-ID Pinpoint 6 Levels of Adjustable Sensitivity and Volume 7-Inch Concentric Elliptical Waterproof Searchcoil Ultra-lightweight Only 2.3 lbs. Operational Weight 7.69 kHz. Operating Frequency