VLF means Very Small Frequency and is similar engineering Employed in detectors constructed for cash, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Listed below are five reasons why you might go with a VLF in excess of a PI https://www.sociomix.com/c/ugc/gold-detector-for-modern-prospectors/971791769061550