A vehicle alarm can best manifest as a device which is positioned in a car for the exact purpose of foiling theft in the automobile itself or its contents. These car alarms usually work by creating a very high volume sound, what about a siren or possibly a klaxon. It could also be a recorded verbal warning or car�s horn.
Once the problems that are essential for triggering the alarm are met, for example opening a door or breaking the car window, the alarm creates a the top volume sound and also flashes some of the lights with the vehicle. In some cases, the alarm may notify the owner of the car through paging system or interrupt the various circuits in a car that are needed for the vehicle to start.
Car alarms may be separated into two classes. The first category is OEM whereby the alarm is made into car while still on the factory. These are the basic most popular forms of alarms. They are generally armed or disarmed using the car�s key entry remote. Another category is aftermarket alarms. These may be armed or disarmed through a remote the same as OEM alarms.