The sound source of the alarm is usually an ordinary 110 police car chip, or a chip recorded by the manufacturer itself. The content is generally fixed and cannot be changed. Moreover, the sound source of the alarm only plays a simple sounding role. Furthermore, the speaker of the alarm is made of piezoelectric ceramics, which is not suitable for playing music in MP3/WMA and other formats. Unless you also replace the speaker, it is possible to The alarm is connected to the MP3 player.

The simplest thing is to get an electric car alarm and a small speaker with a plug-in card, and you can achieve the effect you want.