Fisher F44 The Ultimate Weatherproof Multi-Purpose Metal Detector Weatherproof- NOT WATERPROOF Operates on 2 AA Batteries (25-30 Hours) Fe-Tone® (Adjustable Iron Audio) Ground Grab® Computerized Ground Balancing Manual Ground Balance 9-Segment Visual Target-ID Large 2-Digit, 1-99 Numeric Target-ID Iron Identifier Icon Backlight for Low Light Conditions 5 Modes of Operation: JEWELRY, COIN, ARTIFACT, CUSTOM, ALL METAL Pinpoint 20 Levels of Adjustable Sensitivity 20 Levels of Adjustable Volume 4-Tone Audio-ID Non-Volatile Memory Saves Settings 11-Inch Concentric Elliptical Waterproof Searchcoil Ultra-lightweight Only 2.3 lbs. Operational Weight 7.69 kHz. Operating Frequency Recommended for: Inclement Weather Hunting Beach Hunting Coin Shooting Jewelry Hunting Relic Hunting