How do the retail shop theft alarms work?

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I bought a dress from a mainstream shop. The item didn’t have a tag on nor a price tag, so the cashier had to manually enter the price. When I left the store the alarm didn’t set off but a machine that the security guy was holding started beeping. He approached me, showed me a tablet that had the item I bought on and asked me if I have a receipt for it , which I did, but I had to walk in and out the store again until the machine stopped beeping.
How does this alarm system work?

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7 Answers

Anonymous 0 Comments

There are several versions. There is a clip on version for clothing. There are also stickers with a transponder inside that can be deactivated at the register. These are used a bunch at Target and WalMart inside the packaging. Another type is the clip on with dye. The clip that holds the transponder has a dye pack that releases if you try to remove it without a special tool.

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