... is optional.2. With high sensitivity, can detect Ferrous and non-Ferrous metals.3. Alkaline batteries work with 10%-15% alarm ... Mining, electronics, hardware, jewelry, coinage etc. precious metals manufacturing andprocessing sites.4. Other public sites, which need ... metal detector.6. Can detect various metals, such as: Copper, Ferrous and Tin etc.SPECIFICATIONS TypeMD-3003Detection Distance1 ...