Supermarket burglar alarm widely used in clothing, department store, convenience stores, supermarkets, drug stores, cosmetics shops, jewelry stores, sporting goods stores, bookstores and other open spaces chart. Supermarket goods are generally equipped with two kinds of anti-theft devices, one is a small magnetic stripe, commonly known as "soft standard", the other is a pin buckle with a magnetic device, commonly known as "hard-standard", they are using magnetic induction principle to theft, the supermarket door alarm device known as the "Loss Prevention door", which is equipped with a magnetic sensor. Will alarm if the goods have not been demagnetized by Loss Prevention door. Customers pick finished goods in the cashier, the cashier will be on merchandise with "soft standard" and "hard standard" degaussing, if it is "soft label" is on the side of the cash register degaussing degaussing, if it is " Hard standard "will use a special tool to be" hard-standard "commodity prop open. Such goods purchased by customers can safely pass constitute "Loss Prevention door" a, anti-theft system. EAS is a commodity self-defense device, it gives merchandise by means of self-defense capability of electronic technology, that if someone attempts to secretly put the goods out of the shop, it will notify the system, alarm. This changed radically in the past all the security systems remain in a state of passive anti-theft monitoring, so that the implementation of security measures on each item, change the past "man to man" approach. EAS system consists of detection gate, degaussing, security tags. Detection door: door consists of a transmitter, a receiver door (single) or an emission threshold, two reception door (dual channel), with anti-theft tags: standard soft and hard standard, users can choose according to need. When the magnetic stripe has not been demagnetized by detecting door channel that alarm. Degausser: the standard for soft commodities were two works degaussing, EAS system: 1. soft labels on the goods. 2. Export Channel installed at Australia Jady EAS systems. Goods placed within a certain height above the degaussing across, you can degaussing. 3. The non-payment of goods through export, detection gate detected without degaussing magnetic stripe, that audible alarm. 2, the use of advanced digital technology;