VLF means Really Minimal Frequency and is similar technologies Utilized in detectors designed for cash, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Listed below are 5 main reasons why you may select a VLF above a PI Your not https://www.driedsquidathome.com/forum/topic/99006/metal-detector-ground-balance-explained