| 摘要 |
This device enables the user to personalize the sound that comes out of his/her siren, since this invention is an improvement over conventional sirens in that it has a 3.5 mm female jack for an audio input, a male connector for a pushbutton, a female connector joined to the pushbutton and said pushbutton, in addition to a recording/playback unit, a repetition control unit and an amplification unit incorporated with which the user can record an unlimited number of 30-second audios, whether from a microphone or a PC, and can play them back repeatedly to serve as an alarm.
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