VLF means Incredibly Small Frequency and is identical technology Employed in detectors constructed for cash, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Here's 5 main reasons why you could select a VLF over a PI After substantial tests and https://ccn.dynamics365portals.us/forums/general-discussion/b6f2b3e0-97f6-f011-ad8f-001dd80946e3