Door sensors detect door position (i.e., open or closed) based on the precise gap between the magnet and the reed switch.
The best Prime Day 2026 smart home security deals on cameras, video doorbells, and smart locks from Ring, Arlo, eufy, Blink, ...
TMD’s first bicycle lock combines a Bluetooth proximity sensor and motion alarm with a slender core of hardened steel chain ...
We've tested and reviewed products since 1936. Read CR's review of the Aqara Smart Lock U400 door lock to find out if it's ...
Your smart lock is a liability disguised as convenience.
While there is a time and place for wirelessly controlled devices, sometimes you want something you can just reach out and ...
If you’ve read anything about technology in the last few years, you may have seen the term “encryption” floating around. It’s a simple concept, but the realities of its use are enormously complicated.