“Alexa, I’m leaving.”
“OK — I’ll be on guard.”
That’s the gist of Alexa Guard, a new feature from Amazon that lets your Echo devices keep an ear out for trouble when you’re away from home. If Alexa hears something after you’ve put her into Guard mode — a smoke alarm ringing or the sound of shattering glass, for instance — she’ll send you a notification. If you’re an ADT or Ring subscriber, she’ll notify your home security monitoring service, too.