I replaced all of them this time instead of touch-type switches, but I picked the best item with reviews. The touch-type switch works only when you touch it correctly, so it’s hard for the family. It’s button-type, so I can feel the sense of a mechanical switch. The product finish is great and the material is strong. However, when waiting, the color of the LED lights is blue, so it is noticeable on dark nights. I think it would be nice if I changed it to a little soft color like a light green.

Arrived earlier than expected and without damage to the box. I ‘ve tried it for a few days and everything works properly. It does work with Sim card (South America) and wifi. Easy to use; If the manual is not understood, there are support videos on youtube to clarify any questions. The sensors are already linked and have their respective batteries.
Before purchase, the seller resolved my doubts, although it took a while to reply.
Very satisfied with the product so far.

Thank you!

Received quickly, satisfactory operation, the battery is quite low so it seems better to leave the device permanently connected, the supplied cable is a bit short.
The device gives a lot of interesting information about air quality.

Good seller Good quality Thanks

Good product, it works perfectly, it took time to arrive but I think it is due to logistics of my country, I recommend.