VLF means Extremely Very low Frequency and is the same technology Employed in detectors developed for cash, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Listed below are 5 main reasons why you could possibly choose a VLF more than http://lkf.phorum.pl/viewtopic.php?p=53725#53725