Handhold metal detectors are highly sensitive to metals.It uses a single battery of 9Volts.with sound alarm or vibrating alarm.easy operation.reliable.
Walkthrough detecting doors have built-in smart chip that stores the statistics of sensitivity recommended by a variety of places, including airport,dock,embassy,army ,prison,government building,customs,station,staduium, clunbs,electronics factories, metal factories, cable factories, airport screening, sports, entertainment field, and so on, which is convenient to call out, and makes the adjusting more efficient and effective;
