Easy installation and immediate updating of the sensor's status both on Homekit (via M1S bridge) and on the Aqara app.

The best door sensors both in terms of speed and battery life. Note only for those who don't know, they require a hub to operate.

Perhaps the best value for money purchase in the category of door and window sensors. It requires an Aqara hub (personally, I bought the M2 which also combines an IR blaster) and it works flawlessly and quickly with every opening and closing. You can automate scenarios through the app (e.g. if at least one of the sensors opens between 01:00 and 07:00, an alarm sound will be triggered on the hub, etc.) and thus optimize the experience.

Personally, I experimented with buying 2 sensors and now that I saw their effectiveness, I immediately ordered the rest for every door and window in the house. The discreet design and easy installation on the material (double-sided tape) as well as the setup in the Aqara application are additional advantages.

It worked perfectly, instantly, and you forget to change its battery. It is also compatible with 'Home assistant'.

It connected easily with Xiaomi Home, through the Aqara Hub. I have had it for about 2 weeks and so far it works very well. It immediately detects any change in status (door opening or closing). In Xiaomi Home, where I have connected it, it works very well and easily connects with any other 'smart' devices.

Very good and for its price it's super!! If you have a spare hub, you can easily set up an affordable alarm system and it shows the contacts on Apple home and you can also do automations with lights, etc