Yes, the perpetrators always know where we are. What they want is to get close to us, but we never know when they are going to arrive. If the Bill S‑205 is passed, we would hear an alarm warning us to leave and hide, and telling us that the police are on their way. We could go to a neighbour's, for example. If we were at work when the perpetrator shows up, we could stay in the office. We wouldn't go out alone on the street.
So the bracelet gives us a warning. The women who were murdered didn't see their perpetrator arrive. When the attempt was made on me, I didn't see him coming. He came in the back door. Once the perpetrator is there, it's too late. We need to have enough time to leave and hide.