Now I'm going to have so glad found the part here at Amazon.
Our daughter is in the morning alone, where it is still quite dark.
But if she has a "small" protection if it feels threatened.
That someone else also it is conspicuous because it is a very quiet person otherwise.
During the test I was really amazed at how loud and shrill especially the device is.
That hurts pretty in the ears.
I'll even order for the other two daughters definitely one.
5 star deserves !!!