Nest Cam IQ has a 4K sensor, 12x digital zoom and gives you incredibly crisp, clear 1080p HD video. With HD Talk and listen you can have a conversation clearly. And Nest Cam IQ is thoughtful about when and how it alerts you. It has advanced algorithms that can identify when someone's in your home, alert your phone and then automatically follow that person as they move through the room. With a Nest Aware subscription, you can even receive a notification if it sees a friend or family member, or if it detects an unfamiliar person.