VLF means Really Reduced Frequency and is the same technological know-how Employed in detectors built for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from 3 kHz to 70 kHz. Here's five explanations why you may perhaps choose a VLF more than a PI The https://www.natthadon-sanengineering.com/forum/topic/65893/how-to-detect-rare-metals-in-your-area