?This product mainly used for supporting the use of the host with the alarm. When a zone is triggered£¬ so strong warning sound can be sended that effective deterrent to theft. Widely used in the construction.                                                                        Specifications                        Rated Voltage     12V DC    <br>          Work Voltage     5 ~ 9 V DC    <br>          Rated Current     100mA    <br>          Sound Pressure     100dB    <br>          Working Temperature     -20 ~ +60 &#8451;    <br>          Standard Current     100mA    <br>          Strong Power Drive     Sound 10W / 12V    <br>          Decibel     100dB    <br>                                                             Package Includes            1 x High Quality Anti-theft Siren Alarm Security System-627<br>