7 SIREN SOUNDS: UTTU car siren speaker can offer 5 loud and clear sounds, includes hooter, fire alarm, ambulance, traffic, police, etc. Please don't use siren when emergency situation happened. PA SYSTEM: UTTU 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. Suitable for Any 12V Vehicle: UTTU car siren speaker can be installed in any vehicle with 12V DC Power. You can install it in Car, Truck, Jeep, RV, Boat, etc. MATERIAL: High quality ABS-plastic housing + iron holder.PACKAGE INCLUDES: 1 x Speaker(with two 5.5ft wires ), 1 x PA mic, 1 x Manual.