PA30002-SPK0022 is a two-channel 2x100 Watt electronic siren bundle, it matches with two powerful 100W speakers 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 adopts the technologies of wireless voice, wireless data and PLL frequency stabilization, etc. and breaks off from the traditional binding connection limit for the sirens, the backlight designed wireless remote control distance is above 10 meters.You can use the PA system by pressing and holding the button on the side of the remote and speaking towards the microphone sound pickup hole. The matched steering wheel mounted remote offers an easy siren operation. And it contains more than 20 different tones by default. It's suitable for different vehicles like Police, Ambulance, Fire, Traffic, Breacher, Engineer and some other Special Operation Vehicles and ocassions that have the demands for PA system audio warning and/or Publicity.