Siren for an alarm system? Definitely yes

Want to do my short experience with the here offered 6-tone siren known.
I currently am building together an alarm system for my basement and was looking for a "loud" siren, which is then connected ultimately with burglary of a relay.
Before I ordered a 230V siren with power plug and approximately 105dB SPL. After plug into the outlet, I wanted to throw this super siren actually right out the window, because the volume was so so quiet that I thought it was simply a joke.

Thereupon I me then this 12V, 6-tone siren connected here at Amazon bestelltund even after receiving the same times on a 12V power supply.
What then overtook me (I did not really expect much), were bestial earache who stopped exactly 2 days ago.
This siren is so incredibly loud that I really advise against urgent of them or similar without earplugs try (at least indoors).
The volume goes really to the bone and is basically exactly what I was looking for, because it is so extremely loud that no one can stand in the immediate vicinity and again flees.

My personal conclusion:

Super siren that is exactly what they should "be extremely loud".
Processing is ok, and fully coming for the price enough (I do not know what others expect a price of about 10 ?!)
Applications: home alarm system, car alarm, and many more.

Strong buy recommendation