·5 tones contained: Air horn, Siren, Wail, Yelp, Piecer.

·Standard power 100W or 200W could to be selected.

·Featured with Radio Rebroadcast, Public Address, Manual, Aux.

·With exterior trigger function, when the siren is turned on, Wail, Yelp and Siren could be activated from steering wheel horn ring, convenient for driver to operate.

·Microphone has the priority, when push the microphone to talk, all siren functions would be stopped.

·The volume of microphone could be adjusted.

·Has polarity protection function.

·Tones could be customized easily.

·Two-color backlight indicator conveniently for night opeation.