Profile: White's Electronics, Inc specializes in offering metal detectors. Our Spectra V3i™ is a turn-on-and-go metal detector using 3 frequency detection to find the oldest & deepest treasures. It features HD color display and 9 preset hunting programs. The GMZ is a lightweight instrument that operates at a frequency of 50khz and uses search coils. It has only 3 controls and features all metal, silent search operation with a unique ground rejection system.