So this wireless smoke detector can I only recommend because they are easy to install and communicate in the test in our house over 4 floors with one another and work great. So on the 4th floor of the alarm goes off, then the equipment on the 7th floor at the same time report the alarm. This makes the smoke alarm of course very safe, but the pressure on the test button triggers the alarm in all smoke detectors are also made. That's so willed and good, but there are various apartments, as should not everyone simply times pressing the test button, otherwise the neighbor is perpendicular in bed! Nevertheless, a great product that is simply recommended!
