Finds Precious Metals & Treasures Buried Underground Effectively Finds Gold Silver Iron Coins Jewelry & More Control Box With Depth Sensitivity Indication Target Pinpoint Ability Adjustable and extendable Locating Arm Comfortable Arm Support & Grip 8" Waterproof Submergible Search Coil Built-in Speaker With Detection Ping Alerts 3.5mm Jack Automatic Ground Balance For Accuracy & Reliability Locating Sensitivity: 6" Max Depth Low-battery Indication Signal Frequency: 7.5khz + and - 1khz Requires 6 AA Batteries