... Detector MD-3003B1 1) High quality 2) 409g each net weight 3) Present 1pc 9V battery for each MD-3003B1 Handheld ... School examination sites, government offices, airports, various game sites and public places.Prisons, detention centers, public organs, courts, ... , electronics, hardware, jewelry, coinage etc. precious metals manufacturing andprocessing sites.-Other public sites, which need precaution.-Can ...