Nest Cam has built-in intelligence and can tell the difference between a person, animal, and vehicle and send alerts directly through the Google Home app[1], no subscription required.Controller Type:Google Assistant.Connectivity protocol:Bluetooth;Wi-Fi.Power source type:Corded Electric Easily check in from anywhere 24/7 with 1080p HDR video[1] with night vision, and see what you missed with 3 hours of ************************************************************* event video history[2]; add a Nest Aware subscription (sold separately) for up to 60 days of video history[3] If your Wi-Fi goes down, Nest Cam will store up to 1 hour of recorded events so you can see what you missed [4] Take action in an instant if something happens; talk and listen with the built in speaker and mic on your security camera or call your local emergency service directly from the Google Home app (Nest Aware subscription required)[5] Set up Activity Zones to receive phone notifications about specific areas of your home and know when familiar faces arrive (Nest Aware subscription required for familiar face alerts)[1,6].Stream your live video feed hands-free on compatible smart displays with Google Assistant, and compatible smart displays, smart TVs, and tablets with Amazon Alexa.