This is a loud noise making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire trucks. It is also used to provide emergency population warning of approaching danger and sometimes to indicate when the danger has passed.
This horn siren has a high quality cable that is connected with the security alarm. When there is an emergency, the horn siren emits alarm having a 110 db sound. The horn siren can be widely used for outdoor installing and can work properly under low voltage.