Relatively good construction. It has metal reinforcement inside the plastic. The LEDs are sufficiently powerful and the siren is very loud for its size.
Obviously, it is not a product that you would put in the Bank of Greece, but it is good for home use.

It also operates at a lower voltage than advertised (mine is 9V), but it will not be able to charge the battery if someone puts one in. It didn't bother me because I didn't put a battery since I have the entire low voltage system on a standalone UPS, so the power supply to the siren cannot be cut off anyway.