7 siren sounds: Car siren speaker can make 7 alarm loud and clear sounds. PA system: Car siren speaker are built in public-address system. You can talk to other people with this mic in your car. You can also have a joke with your friends, they will not know who is talking. Universal: Suitable for Any 12V Vehicle: car siren speaker can be installed in any vehicle with 12V DC Power. You can install it in Car, Truck, RV, Boat, etc. Item Type: Multi-tone and Horns The sound is pure, super loud. With mounting bracket, the installation is simple. 7 different kinds of siren sounds, with microphone functions. Notes: The supply voltage should meet the operating voltage, or can not work properly. The wiring should be correct, otherwise it does not work. The speaker wire should be avoided a short circuit. Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Shouting machine Version: B-red light version Material: plastic colour: Black Package Contents: 1 x Horn 1 x Shouting machine