24V DC Wired Mini Sound & Light Alarm Siren - 120dB Security System for Home, Office, Commercial Use

If you need a loud 12v alarm, that also has a strobe function, this maybe what you need.So, only been used in testing really, and it can be uncomfortably loud.In an actual alarm setting it was reported to being heard from a reasonable distance away and that one was inside an outdoor building.Happy with the 2 so far, and will get a third for another purpose.

This is a 12v siren and it is loud. It's very easy to wire up. There's only 2 wires and it's compact enough to be installed on a vehicle or boat. It's definitely louder than a standard horn.This does also have flashing LEDs for when it is triggered which is really good for an intruder alarm or for if you have multiple stations setup.Good quality and value. Recommended. Thank you for reading my review. I hope you found it useful

good piece of kit

Wanted to add a couple of sirens to a smart home setup, these powered by a 12V PSU from Amazon work fine.

We can hear it when it goes off as can all our neighbours. Fits nicely inside our small / nest looking alarm box

Works well as a doorbell in a noisy workshop environment. The flashing lights help if you’re wearing ear defenders. Just add the correct voltage, and off it goes.

This is surprisingly small given how loud it is.Installation is a piece of cake - two wires, red to positive, black to negative. I added it to a system that already has a rather weak siren and this has more than doubled the volume of the alarm when triggered.Excellent if you want an extra bit of noise but without needing the space to install something huge..

"Wear ear defenders"This is said only partly in jest. At least, in testing, I was just touching the the bare ends of the wires coming from the siren to the power terminals. I flinched and dropped the wires as the noise hit me.The engine in my boat has four different alarms to signify that something is amiss but they all give out a rather muted noise as well as illuminating a waning light. I'm going to arrange this siren so that whichever alarm might sound it too will go off. Nothing complicated, just some relays in the sensor's circuits. I shall also add a guarded on-off switch as an absolute eardrum preserving necessity.