8 Sound Loud Car Warning Police Fire Emergency Alarm Fire Siren 2 Horn PA Speaker MIC System and Wireless Remote Control Alarm Buzzer(400Watt,12V). As the pa system for cars is equipped with a powerful host and speakers and is anti-jamming, sounds can be heard from the distance. Voltage: 12V; Current:≤25A; Sound Level: ≥135dB. It comes with the speaker and wireless controller and remote handler microphone.