It adopts rigorous human movement detection algorithms and integrates with advanced digital integrated circuits processing technique and SMD integrated circuit package. Its detection distance can reach 0-5 meters (adjustable). When object’s approaching the ATM, it can accurately alarm and start video recording. It is featured with small cubage and low power consumption. It can be operated under in very harsh environment such as smoke, dust, vapor and Chemical atmosphere and in the environment of higher or lower temperatures. It can be easily installed. The functions are reliable and stable.