VLF means Really Reduced Frequency and is similar know-how 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 may select a VLF in excess of a PI The depth at https://www.cemkrete.com/forum/topic/118884/how-to-detect-coins-in-old-parks