VLF stands for Quite Reduced Frequency and is identical technological innovation Utilized in detectors constructed for coins, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Listed here are 5 explanation why you may opt for a VLF over a PI http://lkf.phorum.pl/viewtopic.php?p=52642#52642