It is a very compact thermonuclear device. I hope you have a license for it, as I am reporting you to homeland security.
The men in black will trace your IP address and should be there soon to offer all the "help" you need.
Really, how many threads are you going to start about this? We already told you it is a buzzer. I have one of the same design (way less weathered) in my electrical parts bin.
Perhaps a short video would be what you need to be convinced?