Technical Data Rated Working Voltage: DC13.5V Working Voltage Range: DC10.5V-14.5V Rated Working Current: 18.2A +-0.5A Static Current: <=100mA Rated Output Power: 200W+-10W Output Impedance: 4ohm Microphone Sound Frequency Range: (300Hz-10KHz)?dB Siren Frequency Range: 430Hz-1945Hz Ambient Temperature: -40C--+70C Waterproof Performance: Non-Waterproof Shock Resistance Performance: 20m/S2 GB8108-1999 Mounting Mode: Mounting inside of Vehicle Remark Having seven siren tones: Wail-1,Wail-2,Hi-Lo,Yelp,Hi-Lo1,Horn,Siren Two-way light control function, 15A per way.