VLF means Incredibly Minimal Frequency and is identical engineering used in detectors designed for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from 3 kHz to 70 kHz. Here are 5 reasons why you would possibly go with a VLF above a PI Being an https://www.puffergroup.com/forums/topic/1130/gold-detector-secrets-of-legendary-prospectors/view/post_id/1480