https://ring.com › VideoDoorbell › 2ndGen
广告Join Millions of Satisfied Customers and Choose Ring for All of Your Home Security Needs. Discover Ring Smart Video Doorbells: Monitor Home Anywhere. Expand Your Security Today.
Automated quick replies · Two-way talk · Front door security · Slim, low-profile designs
Models: Battery Doorbells, Video Doorbell 2nd Gen, Video Doorbell 3, Video Doorbell 4
Ring's New Doorbell Has 1080p Video & A Swappable Battery –
TechCrunch