Fisher F22 - 11DD Weatherproof All-Purpose Metal Detector Visual Target-ID by Category Weatherproof - NOT WATERPROOF Operates on 2 AA Batteries (25-30 Hours) Fe-Tone® (Adjustable Iron Audio) Iron Identifier Icon 9-Segment Visual Target-ID Large 2-Digit, 1-99 Numeric Target-ID 4 Modes of Operation: JEWELRY, COIN, ARTIFACT, CUSTOM Pinpoint 10 Levels of Adjustable Sensitivity 20 Levels of Adjustable Volume 4-Tone Audio-ID Non-Volatile Memory Saves Settings 11-Inch DD 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