VLF stands for Really Low Frequency and is similar technological innovation used in detectors crafted for coins, jewellery, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from three kHz to 70 kHz. Here's five explanations why you could possibly choose a VLF in excess of a PI https://www.navacool.com/forum/topic/279013/gold-detector-chronicles-of-legendary-prospectors