The top of the detector

Seen on the internet and after reading the features of this detector, I ordered it. To install anything complicated, screws are provided but not the ankles, for the software I have a windowsphone and I had to buy on the store 1,29E the application, at home I have a mac and the application has been downloaded to the Apple store. Once all installed with the proper settings, it's a breeze and a redoutable.La effectiveness host voice is nice. so I do a smoke test with a misty, when the alarm that triggers the voice reports the problem the color ring lights and the siren sounds, a message is sent directly to the phone to signal detection smoke and then another message for the dissipation of the top fumées.C really a bit expensive compared to some, but high technology plus it is pretty and at night it lights a white ring when passing next to it (is part of the parameters to be set with the application) I recommend this detector NEST thank you