The Nest Doorbell has built-in intelligence and can tell the difference between a person, package, animal, and vehicles and send you an alert in the Google Home app, no subscription required. Easily check in from anywhere 24/7 with live HD video with HDR and night vision; see what you missed with 3 hours of free event video history[2]; or add a Nest Aware subscription (sold separately) for up to 60 days of event video history. If your Wi-Fi goes down or there’s a power outage, the Nest Doorbell will store up to 1 hour of recorded events so you can see what you missed. The Nest Doorbell is easy to install wired or wire-free; the built-in battery means it works with any door, or connect it to your existing doorbell wires with the included wire connector. Whether you choose battery or wired installation, the battery-powered Nest Doorbell cannot continuously record 24/7 video history, even with a Nest Aware subscription. Talk and listen to visitors at your door, even if you’re away; use the Google Home app to say you’ll be right there, ask a delivery person to leave your package, or respond to visitors with pre-recorded messages. The Nest Doorbell camera has a tall vertical field of view, so it’s easier to see people head to toe or packages left on the ground; you can also keep a close eye on high-traffic areas with Activity Zones.