You can configure supported Echo devices to detect specific sounds you select, such as the sound of smoke and carbon monoxide alarms and glass breaking. Guard will only detect these sounds when set to Away mode. Similar to the wake word, the device detects these sounds by identifying acoustic patterns that match the sounds you select. Guard does not store or send audio to the cloud unless the device detects a selected sound. Alexa can send you a Smart Alert, via a mobile notification, that allows you to listen to detected sounds through your Alexa app. If you connect a supported smart smoke or carbon monoxide alarm or smart water leak detector to Alexa, Alexa can also send you a Smart Alert when those sensors detect an event.
Note: Alexa Guard is not a replacement for an alarm system or life safety device and cannot automatically contact emergency services on your behalf.