The main principle of anti-theft electronic soft label is that it is equipped with a special detection system. When the goods with the label pass through the detection system, the system will generate an alarm signal. The label itself is a combination of an integrated circuit and a coil. When the label passes through the detection system, the coil is energized by the magnetic field, and the integrated circuit is activated, which will cause the label to send out a specific frequency signal. When the signal is received by the detection system, an alarm will be triggered.