Know if a person is at your door; The Nest Doorbell can tell the difference between people, parcels and vehicles, and alert you when someone’s there 
Check in at any time; Know what's happening at your door 24/7; Check your doorbell camera from anywhere using the Google Home app and get alerts about important activity, like a visitor or delivery 
Go back in time; See what you missed with 3 hours of event video history, using the Google Home app; The Nest Doorbell (battery) does not record 24/7 video history, even with the optional wired installation 
Designed for almost any door; The Nest Doorbell is wireless and battery-powered, which means that it works with almost any door, whether you live in a house or a flat 
Expected battery life; Battery life will depend on factors including activity, temperature, and camera settings that you select; You can extend the battery life of your camera by adjusting video quality, length of video clips, time between recorded events, and using activity zones to monitor specific areas 
Install it yourself; Because it’s a battery-powered doorbell, installation is painless; If you prefer wired installation, you can connect it to your existing doorbell wires with the included wire connector 
Talk to who’s there, from anywhere; Talk and listen to visitors at your door, even if you’re away; Just use the Google Home app to say that you’ll be right there or to ask a delivery person to leave your parcel