1.Rated Power200W 2.Rated Voltage: 12V 3.Frequency Range: 500-4600Hz Technical Datas 1.Rated Power200W 2.Rated Voltage: 12V 3.Rated Impedance:8Ω,16Ω 4.Frequency Range: 500-4600Hz 5.Sound Pressure:118-120Db 6.Sound Distortion Factor:≤5% horn speaker,loud speaker,horn speaker,amplifier,police car alarming siren and horn