AS8202-SPK0021 is a one-channel 100 Watt propagandistic electronic siren bundle with USB interface on the main siren box to plug in USB sticker and to play your wanted custom-made MP3 format recordings, it matches with a 100W octangular speaker and dual remotes. Equiped with two auxiliary light terminals on the main siren box makes it possible to run two-channel 12V Led Lights and is with easy light control on the siren remote. It has microphone on the remote for broadcasting and the backlight designed wireless remote control distance is up to 10 meters, it gets rid of the cable limitation and make it more flexible for siren operation. The attached steering wheel mounted remote offers an easy siren operation while driving. And it contains more than 20 different tones by default to fit for different vehicles like Police, Ambulance, Fire, Breacher, Engineer and some other Special Operation Vehicles. It will be a good choice for those vehicles and ocassions that have the demands for PA system, audio warning and/or Publicity.