Works with Alexa for voice control (Alexa device sold separately). DON'T MISS A THING WITH NEST ALERTS: Whether the kids just came home from school or the dog has decided to eat those new pillows you just bought; the Nest Cam sees it all! Get alerts through your Nest App whenever the camera detects movement and activity. And the coolest part is that the Nest Cam can tell the difference between movement from say a hand getting into a cookie jar, and a person entering a room. Person Alerts and Activity Alerts can help keep your home safe even if you aren't there. BE HEARD WITH NEST: Nest Cam Indoor has a built-in speaker and mic, so you can hear what's happening at home. Or tell the dog to get off the couch.