·DC9-16V 6 OHM Effective Emergency Siren System CJB300-S6301
·Heavy duty, delicate, high technology; 
·Features with MIC, 7 basic siren tones, 10 horns and function of two different tones mixing from two speaker channels; 
·300W to 600W hight power output; 
·Micro-control circuit to provide stable performance; 
·Built-in protection against over voltage, short circuit or reverse polarity; 
·Dimmable LED backlighting for controller; 
·Three light control buttons; 
·Horn output independently connected to vehicle steer, convenient for driver to operate horn tone when needed;.