VLF stands for Extremely Lower Frequency and is the same technology Utilized in detectors designed for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Here's 5 explanations why you might decide on a VLF above a PI The GPX https://ccn.dynamics365portals.us/forums/general-discussion/bfbd353c-93f6-f011-ad8f-001dd8050036