VLF means Quite Minimal Frequency and is identical technological innovation Employed in detectors built for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Here's five explanations why you could possibly choose a VLF around a PI The 2 primary https://ccn.dynamics365portals.us/forums/general-discussion/b6f2b3e0-97f6-f011-ad8f-001dd80946e3