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.
Slim, low-profile designs · Works with Alexa · Free shipping over $49 · Automated quick replies
Models: Battery Doorbells, Video Doorbell 2nd Gen, Video Doorbell 3, Video Doorbell 4
Ring's New Doorbell Has 1080p Video & A Swappable Battery –
TechCrunch