The Google Nest Doorbell (Wired, 2nd Gen) offers HD video (960p/1080p), two-way talk, night vision, and smart alerts (person, package, animal, vehicle) with on-device ML, providing up to 3 hours of event video history locally without a subscription; it's IP54 weather-resistant, connects via Wi-Fi, requires existing doorbell wiring, and integrates with the Google Home app for notifications and control.