The TACKLIFE is fun and simple to use and is also produced for teenagers and also for Grownups. You may modify the detector stem according to the person from 24 to 45 inches. Gerhard Fischer created a portable steel detector in 1925. His product was 1st marketed commercially in 1931; https://metaldetector-ace-250-gar00998.blogdigy.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-metaldetector-43252435