Features:£¨There is a microphone button on the control side)12 Volt Powered.Works with ANY 12V Car、Van or Truck.60W Speaker provides very loudly sound.It is about 300 decibels unit at full volume.5 Siren Sounds£ºHooter/Ambulance/Traffic/Police/Fire AlarmColor:BlackMaterial:ABS PlasticEasy to Install with screws.4-Hole Mounting BaseConnect the red wire to the postive pole and the black wire to the negative pole.Package Included:1 x Car Loud Horn1 x 5-Sound Siren MicrophoneSome Mounting Brackets and Screws We also have a 6-Sounds Horn、Please Contact Us If You Need.