VLF means Really Very low Frequency and is similar technology used in detectors developed for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from 3 kHz to 70 kHz. Here are 5 explanations why you might pick a VLF in excess of a PI The https://webhitlist.com/profiles/blogs/why-professionals-prefer-a-gold-detector