To The Product:
I have a friend living in the street of 200m below.
He looks out the window and can hear every word.
Of course, making friends when every neighbor will notice that;)
Information on volume:
It should not be set too high otherwise there is a whistle the regulator.
If you then set it right, you can speak very good so no feedback etc.
You really erhallt the whole neighborhood and everyone really heard.
I think also that I sometime soon announcing that a bomb is defused and all people "shall forthwith come from the house": D
That just does everyone;)
The siren:
It is louder than the speakerphone, and that's really extreme!
You must in no way his ear before holding otherwise hurt tuts.
For processing:
The product can not be kept as the other megaphones loosely in his hand, because it's hard.
There are dan strap that is placed on the shoulder and even floats in the megaphone basin height.
The product is built in my opinion, stable and robust, yet one should not pepper in the corner there.
All in all 5 stars :)