Pyle PHMD55 - Metal Detectors Water Proof Search Coil Treasure Hunter Pin-Point Detector, Adjustable Sensitivity, Headphone Jack Control Box with Depth Sensitivity Indication - Target 'Pin-Point' Detection Ability 7.8'' inch, Waterproof Submergible Search Coil - Built-in Speaker with Detection 'Ping' Alerts Discrimination Levels: Low/Medium/High Frequency Tones - Adjustable Volume & 4-Level Sensitivity Settings Digital Depth Indication: 2''/4''/6''+ - Headphone Jack (3.5mm) - Pinpoint Detection: Max Depth 6.0'' inches Battery Operated: 6 'AA' Batteries (not included) - Locating Sensitivity: Max Depth 8.0'' inches