Receive, unpacked and installed (screws and dowels - of course this). Everything is described in detail and it is one, in flawless German condensed operating instructions, at. Unfortunately, this is not self-evident. If an alarm is triggered, there is a "stop button". This is at least useful for testing - in an emergency, I will probably not consider him more.
In my rented apartment I get rid of this smoke detector - against cheaper Chinese goods - take action as possible einzuhandeln me no false positives and thus the discontent of my tenants.
