The delivery was very fast, the product is as described, pairing with the app is easy and the alarm volume is fine. As for the detection of smoke at first impression works well, it is not activated with little smoke which is good why it does not create false alarms.
I recommend it to the 100%, easy installation, programming and comprovado, functional and super discreet, and the most important thing is heard perfectly, Take me 2 and buy 2 more.