Automotive Siren System Siren Tones Wail Sound Level Not Applicable Overall Height 2 in Overall Width 8 1/2 in Overall Depth 5 1/2 in Features Microphone Controlled Siren Amplifier and Light Functions Includes Amplifier Mounting Brackets Horn Ring Transfer Microphone Control Head Microphone Standards SAE J1849 Input Voltage 12V DC Maximum Frequency 1 550 Hz Maximum Operating Temperature 140 Degrees F Minimum Frequency 725 Hz Minimum Operating Temperature -22 Degrees F