ShangHJ 4PCS 110dB Electronic Black Mini Piezo Alarm Siren DC 12V Insurance AntiTheft HighDecibel Square Shell Active Buzzer Alarm for Car Safes

I’ve used these for wireless fall-down alarms on the receiver end, and an electric eye snake detector in my garage while in Oklahoma. It even worked for a tarantula entering. Also. They work down to 5 volts , making them even moro versatile……with a bit less volume.

The media could not be loaded.  Preciso lo que buscaba bien ruidosoLo recomiendo al 💯.

The media could not be loaded.  I tested the siren at 3 V, and it was painfully loud. At 12 V I had to cover the speaker to prevent hearing damage. This would be highly effective as a security alarm. This alarm emits a dual frequency siren, please see video.

Awesome sound and very loud. Just what I was looking for perimeter alarms.

This was bought to repair the buzz feature that lets you know you have left your lights on when you open the door of your car.It was installed without incident, however, when I drove my car for the first time after the installation, it fell out of the dash and onto my foot. We tried all four in the pack and not one of them worked.Don't buy this product. It's not worth the money nor the time to install it in your car.

Used outside and works well.

Used them on Ice Fishing Tip-up's. I can hear if a flag goes up over 100 yards away depending on wind.