A special feature of this smoke detector is that it has an integrated battery you can not replace so. As soon as the built-in battery is empty, the smoke detector is so obsolete I find rather unfavorable
But the manufacturers are, however, a service life of 10 years at least you have to go so far no batteries.
I have tested the smoke alarm, as I kept the smoke from a candle including extinct. He also broke the same and informed me about the possible fire by a very loud and shrill beeping of a pervasive itself was hard to hear.
The beep fades away as soon as you press the button on the smoke detector.
The installation on the ceiling was very simple: two small drill holes, plugs pure and smoke detector screw by using two screws.
The smoke detector, as it should be otherwise complies with a white blanket, very reserved and can hardly be seen.
Overall, we are with this smoke detector been very pleased and would recommend it unreservedly.
