【實用個人化app】Siren Alarm Pro|最夯免費app-綠色工廠好玩App

[ How to use]

- tap on sound name you want to play sound

- create pass lock to unstop play sound

- repeat pass lock to stop all playing sound

[ Feature ]

- help other one by trick thief or bandit go away.

- warning in many of urgent case

- no collect any data from user

- no internet connection require

- easy to use

[ What is Siren (Alarm) ?]

A siren 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. There are two general types: pneumatic and electronic.

Many fire sirens (used for calling the volunteer fire fighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station, or on a pole next to the fire station. Fire sirens can also be mounted near government buildings, on tall structures such as water towers, as well as in systems, where several sirens are distributed around a town for better sound coverage. Most fire sirens are single tone and mechanically driven by electric motors with a rotor attached to the shaft. Some newer sirens are electronically driven by speakers, though these are not as common.