★ The Zone Tech 60W Five Tone Emergency Sounds Air Horn is manufactured and sold exclusively by Comfort Wheels. With 5 tones, a PA microphone, and a 60 Watt siren system the Air horn can be heard loud and clear! Sound pressure level is up to 226=3Db. Catch everyone's attention this amazing system! ★ The horn offers 5 great sounds; a traditional Hooter, a ringing fire alarm, a wailing ambulance, a blaring police siren and the distinct traffic sound. Simply choose one depending on your purpose or type of emergency. ★ The installation is never complicated. Simply connect the red wire to a 12v source, and then run the black wire to a ground or negative battery post. With very large vehicles, the installer may need to purchase additional wiring to elongate the wires. Typical installation time only takes less than an hour. For further instructions, see package insert. Zone Tech brand is known worldwide with superior product quality and service!