https://ring.com › Video › Doorbells
广告Battery-Powered or Wired, Ring Has Smart Security Solutions for Every House or Apartment. Ring Smart Video Doorbells: Help Monitor Home Anywhere. Expand Your Security Today.
HD Video w/ night vision · Two-way talk · Customizable settings · Never miss a visitor
Models: Battery Doorbells, Video Doorbell 2nd Gen, Video Doorbell 3, Video Doorbell 4
Ring's New Doorbell Has 1080p Video & A Swappable Battery –
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