VLF means Very Minimal Frequency and is similar technological innovation Employed in detectors developed for cash, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Here are 5 reasons why you might pick a VLF around a PI Our writers and http://inquisnower.phorum.pl/viewtopic.php?p=750251&sid=aa65f24a6c78d97b3e0fe9a56c6667bd#750251