I have tested the Alexa Echo Guard mode for glass break, smoke alarm, and security system alarm sounds. It detected the sound of breaking glass and the sound of a battery operated smoke detector and sent my mobile phone an alert message. But it did not react to the sound of my hard wired security system alarm which has a louder but different sound than a smoke detector. Unfortunately I have 2 hard wired smoke detectors on my security system and echo did not react to that audible alarm which is louder than the battery operated smoke alarm. Is it by design that Echo Guard does not react to a Security Break-in alarm?