Siren With Push Button Control Head Siren Tones Air Horn Hi-Lo Yelp Wail Overall Height 4 in Overall Width 9 3/4 in Overall Depth 6 13/16 in Features Adjust Backlight Brightness and Public Address Microphone to Accommodate Various Light and Noise Conditions The Controller has Three Distinct Zones Sirens and Primary Lighting Auxiliary Devices and Traffic or Warning Function Standards CA T13 J1849 R10 Input Voltage 12V Maximum Operating Temperature 149 Degrees F