VLF stands for Incredibly Very low Frequency and is identical technology Employed in detectors developed for cash, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from 3 kHz to 70 kHz. Here are 5 explanation why you would possibly opt for a VLF about a PI https://whenyouriseup.activeboard.com/t72455626/when-your-gold-detector-beeps-at-midnight/?page=1#lastPostAnchor