The Eufy FamiLock S3 Max uses palm vein recognition and features a built-in screen to show you who’s at the door.

The Lockin 4-in-1 Smart Lock can also act as a video doorbell and security camera, while reading the veins in your palm and fingerprints to open your front door. One of the most impressive ...

I write about commercial cinema technology and smart-home ... integrated video monitoring, enabling users to see who is at the door without requiring a separate smart camera.