Car Warning Alarm Model A17 is a kind of propagandistic wireless siren that can read and play the MP3 mode sounds from the USB sticker. So there's no limit for the alarm sound now when you choose this model for your car.          

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.
 
 
Specifications:

Working Voltage:DC12V
Working Current: Within 45A
Power:400W
Resistance:4Ω/6Ω
Main Box Size:21.5*17*6.5cm
Handle Size:10.5*5.5*2cm