Rated Voltage 12VDC -- Only 30W Operating Voltage 9~15VDC Output Output Power 30W Min.S.P.L 112dB Max.Rated Current 500mA Tone Nature - Warble/ 1-Tone Operating Temperature -20~ 60C Voice Coil Impedance - Piezo eletric siren Rated Voltage 12VDC -- Only 30W Operating Voltage 9~15VDC Output Output Power 30W Min.S.P.L 112dB Max.Rated Current 500mA Tone Nature - Warble/ 1-Tone Operating Temperature -20~ 60C