Electronic Siren Model S8 is a kind of propagandistic wireless siren that can read and play the MP3 mode sounds from the USB sticker. So you can put any of your warning alarm sounds, promotional recordings and other sounds in MP3 format into your USB sticker and then plug in the USB sticker to this siren and play them via the siren. There's no limit for the alarm sound now when you choose this model for your car.  Besides it also includes the alarm tones for the police car, fire fighting, ambulance and clear the way,etc. as default in the siren box.  Please feel free to contact us if you'd like to know more. Thanks!      
 
Specifications:

Working Voltage:DC12V
Working Current:Within45A
Power:400W
Resistance:4Ω/6Ω
Main Box Size:21.5*17*6.5cm
Handle Size:10.5*5.5*2cm

Application:
These sirens are suitable to be installed on Police Car, Ambulance Car, Fire Fighting Vehicle, Enginering Van, Breacher, Mobile Library and other special operation vehicles.