Does this siren also sound when the right one is not connected to the car battery?
Does it have its own battery?
Siren in the Car - Car Horn (Police, Rescue) with six preset tones and sound power up to 105 decibels. Connect it into 12V using cables.
Siren in the car with a megaphone - Car Horn (Police, Rescue) with six default tones and sound power up to 105 decibels. SIREN can simply install on/in the vehicle thanks to a solid support. Connects to the 12V (car battery). There is also a function of the megaphone for the possibility of warning of passers-by.