I have spent several years working in a service company for safety technology and the Merten "ARGUS" in principle listed in the offers. The "ARGUS" was bought by all classes and there were problems before. Easy to use, long battery life (you should really only use Duracell) and damn loud signal. Whoever can still go back to sleep is probably deaf from birth. Looks good, definitely not "cheap", but nevertheless subtly present. And the price is unbeatable in this case. And I know what I'm talking about. A good choice of Merten "ARGUS".
