1.Sixteen detection region of the same height of human body. 2.With lcd screen panels, with function of remote controller. 3.With led alarm light on columns displaying the accurate position of the targets. 4.Four corresponding infrared transmitters and receivers, no blind area. 5.Sensitivity of every area can be adjusted independently from 0-99, without the interference of scheduled metals. 6.Microprocessor digital control technology, strong anti interference ability. 7.The function of statistics:the number of passengers and alarms can be count. 8.It can be used independently or work together with the same mode(minimum spacing can be up to 40cm), to meet the requirements of the personnel large flow. 9.Password protection function:only the authorized person can operate it. 10.No harm to people, film and magnetic recording materials.