VLF means Incredibly Minimal Frequency and is the same know-how used in detectors developed for cash, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz starting from three kHz to 70 kHz. Listed below are five reasons why you would possibly decide on a VLF over a PI https://www.chinauksorn.com/forum/topic/8790/how-to-document-your-metal-detector-finds