Hopefully durable smoke detector

The RM 218 smoke detectors Smartwares can be just like all the smoke detectors by means of two screws (dowels and screws are the RM 218 at) attach to the ceiling.

After that you must still press the center of the device for 5 seconds to activate it. In the manual is a bit of a test button, but this is not recognizable ... functioning does it anyway.

Now the smoke detector flashes merrily to himself, which I do not necessarily feel the sleeping area as pleasant. For all other rooms, it is OK.

The RM 218 is well made and has a smooth surface in a slightly greyish white.

If because the battery (which you can not change) really for 10 years by holding it is a good device. Check I can over the next few years, but not, of course ...