It will ring. According to Lv Rui's survey. Com, if you don't take the money of potato chips with you, the alarm in the supermarket will go off. Because supermarket goods are equipped with small electronic tags (commonly known as "soft tags") and pin-type magnetic devices (commonly known as "hard tags"), both of which use the principle of magnetic induction to prevent theft. The alarm device at the entrance of the supermarket is equipped with a magnetic sensor. After the customer pays at the cashier, the cashier will degauss the goods or put "soft label" and "hard label" on them, so the non-payment alarm will sound.