Six overlapping detection region and the body contour of a combination of LED alarm indicator, accurate to determine the location of metal objects. Four corresponding to the launch, the receiver to eliminate dead-end detection. Each region has 100 adjustable sensitivity, in accordance with the requirements in the 0-99 arbitrary regulation, such as exclusion of the first belt, zippers and other objects interfere. Using microprocessor digital control technology, anti-interference ability, through the number of statistics can be automatically and alarm number. Can be used independently, but also with many models to detect Door Units and Net work (minimum spacing of up to 40CM), to meet the flow requirements of staff. Operating parameters with a password protection function to prevent non-authorized personnel to amend the parameters. Assembled structure, and ease of installation. EMC electromagnetic radiation in line with the standards: one for the wear pacemakers, pregnant women, film and magnetic recording materials without damage.