Megaphones are much more popular in China than they are in the US (or Europe). The most popular uses are crowd control (typically on subways) and street vendors.
Both make use of the most insidious feature ever added to a megaphone: automatic looping.
Imagine you’re a trying to tell a crowd to keep right, or perhaps advertise your cheap purses. With a normal megaphone, you’d have to repeat yourself continuously — you might even have to pause occasionally to clear your throat, or breathe. Luckily these sophisticated megaphones will pound your message into the masses, without pauses! You don’t even have to hold it, or be nearby. All the annoyance, none of the social embarrassment.
Technology!

One Comment
Yes, this is one of those few savory moments where you wish there was a petty thief nearby.