Siren Alarm - Police siren sound for self-defense

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Integration of a variety of siren,click the screen to trigger an alarm.Whether as a warning or a tool for self-defense are very useful.Also can be used as a signal in noisy environment.
-Including police siren,ambulance siren and many other sirens.
-The screen flashing frequency can be adjusted.
-The operation is extremely simple,alarm can be triggered immediately.

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