Model No: AT-600A Multi-zones walk through metal detector for indoor use,it can be set 6 zones or 18 zones to meet different customers' need. 5.7 inch LCD display Sensitivity per zones to be 250 grades (adjustable) Max detecting accuracy : 6g metal like chinese one coin. No radiation injury: no harmless to the wearer of the cardiac pacemaker, pregnant woman, magnetic medium, etc. Advantage: 1., the 6 zones and 250 stages of each area are controlled and equipped with infrared start stop function. The machine is equipped with several sets of infrared backup groups, which are separately activated. If some of them are damaged by infrared radiation, the other groups are automatically activated by infrared, which is the function of other security doors. 2. partition navigation function: during the commissioning of the security gate, the LED lights of each location will show the accuracy of debugging. If the accuracy of debugging is super high, LED will continue to blink.