I can confirm the 1 in the middle (in Pic) is a piezo tweeter, you try un-screw the back and see' you will find the same round piece of flat metal attached to a tiny paper cone without any magnets.
The plastic thing is just the housing.
It can go very loud and sharp, and it's not fake.
I used to play with these piezo tweeters when i was young because they are cheap and allmost impossible to burn.