Automotive Siren System, Siren Tones Air Horn, Hi-Lo, Wail, Whoop, Yelp, Sound Level 120 dB, Overall Height 2 11/16 in, Overall Width 6 29/32 in, Overall Depth 6 1/2 in, Features Instant On, Push Button Programmable Siren Tones, Rebroadcast, Siren Scroll, Stand-By, Includes Air Horn, Legends, Microphone, Mounting Hardware, Standards CA T13, SAE J1849, Input Voltage 12V DC, Maximum Frequency 1,675 Hz, Minimum Frequency 625 Hz, Number of Channels 0