POWERFUL BULLHORN - Built entirely from rust-resistant components and pushing 120-130 dB of intersection clearing power, our 100W bullhorn speaker works flawlessly with the SoundAlert control unit. RADIO REBROADCAST - Stay informed, even when out of your vehicle. The helpful radio rebroadcast feature takes input from any other radio and routes it through your siren's loudspeaker so you can hear your GMRS, CB, or HAM radio wherever you are. HORN OVERRIDE - Finally, a siren system that focuses on your safety. Thanks to the integrated horn override function that activates your air horn with your stock horn button, you can keep your eyes on the road, and your mind on the task at hand. MORE CONTROL - Other systems give you the basics, our's gives you the best. With two 16 amp, on/off auxiliary switches, this unit is more than just an authoritative auditory warning device, it's the backbone of your entire emergency warning system. FORCEFUL - On crowded streets, where flashing emergency lights are not always obvious, the SoundAlert siren always gets noticed. Equipped with a 100W amplifier; wail, yelp, and hi-low tones; and an electronic air horn, this unit commands attention.