I am very happy with the product. The outdoor siren can be integrated very easily into the Secvest 2Way (via connection diagram, which can be found on the web). The Horn I regard as very loud, but the flash is a joke ..... !! The red casing gives the impression that is hidden behind a large flash lamp. But in fact, sits a small flash LED on the print, which just brings a wide margin to the outer housing a faint light to the outside.
CONCLUSION: who needs a good siren, is well served, who is looking for a siren & flash, should be oriented differently.