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 Folding and extending Design For Easy Transport Or Storage 7.8" Waterproof Submergible Search Coil Built-in Speaker With Detection Ping Alerts Digital "metal Hit" Depth Perception Read Out Adjustable Volume & 5-level Sensitivity Settings 3.5mm Jack Automatic Ground Balance For Accuracy & Reliability Depth Level Readout Indication: 2" and 4" and 6" Locating Sensitivity: 8" Max Depth Low-battery Indication Signal Frequency: 7.5khz + and - 1khz Requires 6 AA Batteries