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A car alarm is as an audible security system that activates when it detects a possible break-in. But these can create a noisy disturbance which is annoying, often a false alarm and so, often ignored. There are far more technologically sophisticated vehicle security systems currently available.

To help reduce the billion-dollars of car theft, manufacturers have developed innovative technology with two-way communication remotes to warn you when your vehicle's engine is started and notify you why the alarm was activated. The most common options in newer car security systems include glass break sensors, a two-way communication remote and passive arming.

You won't hear an audible car alarm if you're not near your vehicle. If your car is stolen while you're on vacation, it may be many days before you know about it. Some car security systems will phone you or send you a text message if a break in occurs. A two-stage automatic car alarm can also tell you if the car's engine is running, if the car is in motion, or if the car is stationary and has just been bumped into by someone.

If the vehicle is moving, you could communicate to the automatic car alarm to turn off the fuel pump, which will effectively stop the vehicle. Of course, if your car is on the back of a tow truck, stopping the engine will not prevent the theft. Many of the newer vehicle security systems are also equipped with GPS tracking devices to keep tabs on your vehicle's location.

Keeping Car Jackers at Bay: Many vehicle alarm models come with a built-in anti-car-jacking mechanism, which allows you to cut the gas by just pushing a button. The switch is generally nearby the seat belt release, and once pressed it will cut off the gas and put on the brakes to bring the vehicle to a halt. This puts you in control when a dangerous situation might have made you a victim. Having this system means that you can be proactive in making sure that your car is always safe from being stolen.

Often these systems will alert police in the event of a car jacking. Most systems are intended to quickly notify authorities that something is happening and can be invaluable in life-threatening situations. Approaching a car thief in the middle of stealing your vehicle can be very dangerous. It is better to let law enforcement handle the situation. Once your automatic car alarm informs you with a phone call or text message that the car is being stolen, you can notify the police, who will have a head start on catching the thief in the act.