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

The Eufy Familock S3 Max is one of the best smart locks I've tested, with a twist that makes it more family-friendly.

Eufy's FamiLock S3 Max is the earliest arriving model in a line of video smart locks that shine eyes on the outside.

But if a lock fails, the door doesn’t have a lock, or you don’t trust the lock situation in an apartment or hotel, you can ...