Good product. Purchased in July 2025. About a month ago, the siren started to sound strange, as if it was muffled. There is a replacement part for 7 euros which I ordered. The truth is that the siren had not worked more than 5-6 times and I don't know why it broke. However, it will be repaired at a low cost.

I haven't installed it yet but I will return with new information after its installation.
However, it seems quite good and sturdy.

3 Years on a self-made alarm with home assistant everything works like clockwork. It hasn't dropped in performance but I wouldn't mind if it were a bit louder. It works with a simple SONOFF WiFi switch module SV, 5-24V which has been placed inside the siren's case. I have used it with a 12v battery and also without, with a computer UPS keeping it running. With the sonoff, I have planned for it to turn off for a short time every half hour to prevent it from burning out, which is what good alarm units also do.

I struggled a bit with the installation and finding a suitable power supply, but it was worth the effort and the money.

Basically, I have been using it for 2 days and so far I have tried it in various ways without installing it on the wall yet. From my initial impressions, I have a very positive opinion and I have not identified any negative aspects.

It seems to be a high-quality construction, it has several settings, it works even without a battery, and its price is quite low. It has a powerful siren and very detailed instructions in Greek. Only time will tell

Very good construction and powerful. It is placed in a house outside a village in Arcadia in a remote area and can be heard all the way to the village!!