Pro Detector MD-3007B Beginners Starter Metal Detectors Treasure Hunter Finder Earphone Jack-lets you connect earphones (not supplied) to the detector in private. View meter and Pointer-shows the probable type of metal being detected and lets you know when it is time to replace the batteries. Waterproof Search Coil-lets you use the detectors search coil even if you must put it under water. Adjustable Stem-lets you adjust the detectors length for comfortable use. Pinpointing a Target