Handhold metal detectors are highly sensitive to any
metals or illegal substance hidden in human .
It uses a single battery of 9Volts.with sound alarm or vibrating
signal.
they are used in 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;
