In today's electronic commodity theft system, English Name: Electronic Article Surveillance, referred to as EAS, is becoming more and more popular in the retail business system today, it is a kind of electronic theft proof product for retailers to avoid commodity theft when selling goods.

The function of the EAS system is that when there is no counter authorized goods leaving the designated area, it sends out hints and alarm signals to remind the staff to carry out the related processing system.

The EAS system is mainly composed of three parts: the electronic tag, the decoder and the detector.

The electronic labels are divided into soft labels and hard labels. Soft tags cost less and are directly stuck to "hard" goods. Such labels can not be reused. The hard labelling cost is higher than that of the soft label, but its advantage is better than that of the soft label.

Hard labels must be equipped with nail remover for soft, penetrable items, such as clothing.

Most of the decoders are non-contact devices. When a cashier receives a silver or a bag, a highly decoded electronic label without contact with the demagnetization area is automatically decoded. Now some dealers also combine laser bar code scanners and decoders together, which will complete the collection and decoding of the goods at a time and make it more convenient for the cashier to work. However, this way should be combined with the laser barcode supplier to eliminate the mutual interference between the two, so as to improve the sensitivity of the decoder. This detector is usually used for the inspection system of the entrance or exit of the mall. When a machine receives all the correct payments payable by a customer for the purchase of goods, the cashier can decrypt the labels affixed to the goods. If the undecoded goods are taken away from the mall, the alarm will be triggered by the detector, which reminds the customers, the cashier and the store security personnel to do the processing in time.