Back in the days car alarms were cheap sound devices, which were as loud as easy to shut of. Usually a wire cut was enough to allow the thief to drive away with a stolen vehicle, and even when the noise was on, a very few times the police had enough time or interest to intervene. Sometimes alarms kept on going for hours, without anyone worrying about it, except for the poor people, whose sleep was brutally interrupted. Today car alarms have changed a great deal and only to the up side. Cities are less noisy and car owners can rely on some serious protection, instead of just a random noise.
Of course, new technologies made car alarms almost like items from a science fiction film, where car owners get to enjoy full protection and slick devices that can do amazing things. Stolen cars can now be tracked down and engines can even be shut off without the proper activations codes. All of this is a true revolution for the car alarm industry and the future might just bring more, making it really hard for thieves to steal vehicles. This way everyone can now sleep tight, as no random noises will go off, but mainly their cars are safely parked in the street, of course if they have the proper car alarm.
