To secure a EFH an electronic watchdog should diensen. The unit is made good in itself. The speaker is large and heavy and can therefore make sufficient "pressure". Unfortunately bother me two things: 1. At the first detection of a person at the door the machine barks just once. In the second third it andn barks once. This is all bark three times the same - a clever thief will notice this only when you repeatedly. succession reciprocates comes the "dog" finally into gear and then barking for about 10 seconds. I wished for each detection of a person.
2. The Bell schema repeated uniformly. A random me more Bell schemes would make it "real".
I've built myself a switching jack, so I also have a greater Can connect speaker, which then of course "real" sounds.
