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Can you list the top facts and stats about Klaxon?
Summarize this article for a 10 year old
A vehicle horn is a sound-making device installed on motor vehicles, trains, boats, and other types of vehicles. The horn is activated to warn others of the vehicle's presence or approach, or to call attention to some hazard. Motor vehicles, ships and trains are required by law in some countries to have horns. Trams, trollies, streetcars, and even bicycles are also legally required to have an audible warning device in many areas.
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