Features: 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. High quality High quality ABS-plastic housing + iron holder.Package includes 1 x Speaker, 1 x PA mic, 1 x Pack of installation kit. Practical Car siren deals 80W car siren horn with mic PA speaker system emergency sound amplifier to be very load and audible even you are in a distant place. Specification: Type: Car siren Material: Plastic Quantity: 1pc Item Color: Black Voltage: DC 12V Power: 100W Speaker Size: 16.9*15.9*10.9cm / 6.7*6.3*4.3rdquo (L*W*H) PA Mic Size: 6.2*5.8*10.3cm / 2.5*2.3*4.1rdquo (L*W*H) Net Weight: 614g / 21.7oz Package: 1*Speaker 1*PA Mic 1*Pack of installation kit Common problem: Q: No sound? A1: The current is too low to start. A2: The power is too high and the product is burned. A3: This is an installation error. Q: Only hissing, not loud? A: It may be that the microphone and the speaker are too close, which will produce a howling sound. Shopping Tips: 1. The product is suitable for 12V equipment, current above 1.5A 2. Try to keep the microphone away from the speaker, avoid approaching and facing the speaker.