Technical Data Rated Working Voltage: DC13.5V Working Voltage Range: DC10.5V--14.5V Rated Working Current: 30A+-2.0A Static Working Current: <=100mA Rated Output Power: 200W+200W Output Impedance: 4ohm + 4ohm Sound Frequency Range: (300Hz-10KHz) +-3dB Siren Frequency Range: 430Hz-1945Hz Ambient Temperature: -40C-+70C Waterproof Performance: non-waterproofing Shock Resistance Performance: 20m/S2 GB 8108-1999 Mounting Mode: Featuring of Detached Structure, Mounted inside of vehicle only. Remark 1.Seven Siren Tones: WAIL1, WAIL2, Hi-Lo, YELP, PHASER, HORN, SIREN. 2.Double sounds reverberation function with tones of WAIL1, WAIL2, YELP. 3.Having three-way light control fuction, 15A per way. 4.Having RADIO signal input fuction. 5.Having HORN RING triggering fuction, positive triggering to be effective.