20W Auto Electronic Siren Round 3 Tones 1.Car Electronic Police,Fire,Ambulance, Alarm Horn 2.3 Tones With Microphone Speaker Technical parameters 20W Auto Electronic Siren Round 3 Tones Housing: Plastic, MetalRated Voltage: 12V DCElectronic siren with remote controlSound: 3 tones with mic DC-12V 20W 110DBSize: 133 mmWorking life: ≥10000 hours Car Make: car auto truck trailer vehicle taxi cab bus ...