Electronic Article Surveillance (EAS) is a kind of electronic anti shoplifting system that can decrease shoplifting when retailing enterprise implement open-shelf sale, so increase sales and profit. EAS system consists of electronic sensors, deactivator system and label or tag. Electronic sensor that are located at store exits, a transmitter sends a unique signal at certain frequencies to a receiver, which creates a "surveillance area" at a store exit, when a product with an active label or hard tag is moved past a sensor, the sensor sets off an alarm.
