LoJack
LoJack (noun) means a GPS- and cellular-based tracking system used to locate a stolen vehicle. Example: “Police recovered the stolen truck within an hour thanks to its LoJack.”
How to use LoJack
Learner’s notesIn plain EnglishA tracking gadget hidden in a car so police can find it if it gets stolen.
Now used informally for any vehicle tracker, not just the original branded product — similar to how "Kleenex" is used for any tissue.
Fill the gap
Can you complete this real example?
Police recovered the stolen truck within an hour thanks to its _____.
Etymology
Originally a trademark for a system made by Spireon, it later became a generic term for any such device. The name plays on "hijack," swapping "hi" for its opposite, "lo."