?QUALITY ASSURANCE?Alarm installation is simple, easy to operate, stable performance, strong power. 100% tested before shipping, If you have any questions, please feel free to contact us and we will solve the problem together. ?EASY INSTALLATION?Connect the red wire of the speaker to the positive power supply, the black to the negative, and fix it with screws. 9-tone design with clear and pure sound, in which you can choose depends upon your use and needs. ?COMPATIBLE WITH?Car siren speaker can be installed in any vehicle with 12V DC power. Fit for fire alarm, ambulance, traffic, police, engineer, volunteer, private vehicles etc. The siren built-in 9 kinds of alarm. The alarm can control the two lights on and off, you can adjust the volume by the volume control button. ?WHAT YOU WILL GET?Package include: Emergency Warning Horn siren PA system including a control box, a wired hand-held microphone and a heavy-duty speaker. The warning system also offers two switches which you can use to power external devices and appliances. ?COMBINATION?This is a multi-function police siren alarm system integration with a Square mouth speaker and a handheld microphone. The System output is 200W with apowerful speaker and a higher rating of over 120-130db you get quality audio output which is audible from a distance away.