Asunflower&reg; CAR Amplifier Alarm 12v Pa Speaker System Mic 5 Sound New Black 12 Volt powered Speaker is 18cm long and 9cm height 100W Speaker provides very loudly sound,it is about 300 decibels unit at full volume 5 Siren sounds: Hooter/Ambulance/Traffic/police/Fire alarm Microphone for PA system This 12 volt siren work as a PA system including microphone and has 5 siren sounds