I realize the window can be broken..but the main thing I am going for is to have notice if someone enters my room..My door alarms just let a screech and that is why I'll be using them..just so I know if someone tries to enter..and hopefully, scare them off..Realizing , of course, that the alarm is only on when I am in the room..thats why there will never be valuables in therel I think the main thing is..we all have a plan..and what ever that plan is...we relax and enjoy more!