Supplier Code: BE11924 The Premiere Edition Underwater Metal Detector by Barska is used to detect metals in fresh or salt water up to 32.5'. This submersible unit features a 10" search coil, and two operating modes. One mode detects any type of metal, and the other ignores any metal type you are not interested in. An LED light flashes red when a target is detected and an audio tone will emit a distinctive tone when different types of metals are sensed. There are adjustable knobs for sensitivity and volume control since the unit can be used with the included headphones. What's in The Box Premiere Edition Underwater Metal Detector Headphones Carrying Case Arm Rest Strap Owner's Manual Submersible to 32.5' For Use in Fresh/Salt Water Two Operation Modes 10" Search Coil LED Lights Flash Red When Metal Detected Emits Audio Tone for Each Type of Metal