A nice piece of 6

OK, still there was no emergency, where I should have been warned. But as far as I am very satisfied, not least because of the good feeling of security. I have chosen deliberately for the branded product, even if I had to get the price two cheap cell phones.

In fact, you can not engage the detector to the mounting plate when no battery is installed. It is a simple mechanical solution, in which the battery a plastic hooks from the road bends, so that the detector can snap.

The slots are only for the loudspeaker. The smoke can penetrate from the side from all directions. Therefore, the orientation is relatively unimportant.

There are not really a key, but the entire casing is pushed down on the side with the logo a bit for the function test. By pressing briefly, confirmed the detector with fast flashing of the LED. Pressing and holding firmly for 5 seconds additionally the alarm sounds at full volume. This is so shrill that one instinctively pulls his head in shock and drop the detector could (therefore only test if the detectors on the ceiling hangs). Caution: According Bedienugsanleitung can detectors that are once fallen down are no longer familiar and you should replace it ...

The LED has no window, but it shines through the plastic housing. This makes it so strongly attenuated that it does not interfere in the bedroom. Approximately every 30 seconds (not 47 s as stated in the manual) there a very short weak flash, which is only noticed when you look directly at the detector. Looking at the clock, I'm flashing from the corner of my eye and had to miss the seconds after the sound of the second hand count, while I held fixed the detector.

To install the detector in a central room flat under the ceiling with about 50 cm distance from walls, corners, beams, lighting fixtures. Exception: In a pointed roof of the detector is to be suspended about 50 cm deep. I suspect that is otherwise so much hot air accumulates on a hot summer in the extreme point that the relatively cold smoke of a smoldering fire too slow to completely rises.

It is recommended that each unit per bedroom (who sleeps noticed no smoke!) And another in the hallway (no matter where in the house there is a fire, the hall always gets from the smoke!). A detector per 40 square meters in between at a distance of about 8 m. Not suitable for the detector is outside (in the wind the smoke dissipates too quickly) as well as kitchen and bathroom (too often false). Unfortunately, the manual does not provide recommendations for staircases?!?