Ever wonder how those booze bottle security caps work? They're designed to deter shoplifters from stealing the bottles by making them difficult to open. I suppose they also discourage shoppers from sampling tastes of different brands when deciding what to buy.
A YouTuber named Big Clive runs a channel where he disassembles electronic gadgets. He got his hands on one of these security caps and took it apart to see how it operates.
In addition to a ratcheting lock that's released with a strong magnet, it contains a passive radio transmitter that triggers an alarm if someone tries to walk out the door with a bottle of Old Crow stuffed down their trousers.