Foto4easy Mini 12V Strobe Light Siren Security Wired Flash 108dB Sound Alarm AD-103 108 dB alarm sound It can be used with infrared wireless alarm, telephone dialing alarm, automobile anti-theft alarm and other supporting. The super loudness alarm sound can rise to deter thieves. In an emergency, can be given out call the police of sound emergency for help or scare off Compatible with alarm host band output 12 v voltage