VLF stands for Quite Minimal Frequency and is the same technology used in detectors constructed 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 could possibly choose a VLF about a PI Additionally, as https://www.ekdarun.com/forum/topic/124837/how-to-detect-jewelry-buried-underground