There are three ways to prevent theft of the library, namely RF and EM and RFID. RF is generally used in bookstores that sell books. It means that customers do not need to return books after they buy a book and in this bookstores only need to use RF soft labels and RF antennas.Because the soft label of the RF is relatively thin, the soft label is attached to the book, which does not affect the aesthetics of the book. When the customer takes the book out, the soft label can be decoded. If it is a library that have the function of borrowing books and returning books , it needs to use EM system or RFID system, because EM can be magnetically and demagnetized, and RFID can have memory function.EM system is less expensive than RFID system, requiring only EM magnetic strips and reversing magnets and EM seucrity gates. RFID has many components, such as RFID software, labels, inventory instruments, and so on.Each system has its own advantages, depending on the specific needs of the customer, which security system to use.
