https://ring.com/Video/Doorbells
广告Ring Smart Video Doorbells: Help Monitor Home Anywhere. Expand Your Security Today. Battery-Powered or Wired, Ring Has Smart Security Solutions for Every House or Apartment.
Never miss a visitor · Real-time notifications · Dedicated 24/7 support · Live-view
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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