How does automobile anti-theft device

Many new cars now have anti-theft system, and some owners own the installation of anti-theft devices, however, the anti-theft system preparedness third hand, sometimes to the owners trouble. Car anti-theft device have what characteristics? We interviewed several people in the industry.
Battery is dead was hit by a car lock throttle
Often reflects the owner, the car burglar alarm for no reason, sometimes hear thunder firecrackers will be mad Ming endless, seriously interfere with the others rest.
In contrast, Hangzhou owners Mr. Zhu experience more depressing. His car a few days ago because of the battery aging lead to lack of electricity, the result, he tried to start the car, the computer board sudden electronic anti boot system failure. Call to the 4S shop, 4S shop said electronic anti-boot the system in order to protect the car was illegally start and set, the battery did not power the system will work, in order to start the 4S shops can only use special instruments to unlock .
4S shop to unlock not only to spend the unlock fee, but also extra-site service fee. Mr. Zhu Afterward, I thought, since the battery is dead, then let them get a new battery good. But he changed a new battery, the car will not start again no choice but to help the 4S shop, maintenance of the master to solve the problem with less than 5 minutes, for a total charge of 220 yuan.
Mr. Zhu said, depressed anti-start system is meant to be a burglar, but that brings its own trouble.
Burglar divided anti-steal both goods and anti-car theft
Why frequent occurrence of the owners own anti-theft devices accidental injury?
A car alarm supplies agents early years, some alarm call was very noisy and very high sensitivity, sometimes hear thunder or firecrackers will alarm, alarm sensitivity is lowered, and generally kick the tires under which it will be called, so it is not too noisy.
Agents introduced, car anti-theft device, there are two, one is anti-small sneak items inside the car; One is the anti-thief stole the car. To prevent stealing some cars configured illegal intrusion alarm, this alarm door light switch trigger alarm when the door is not the car keys or the remote control key to open.
Anti-car-theft electronic anti-start device, like Mr. Zhu's car, not only in high-end cars, and even some small van there. These cars only recognize the key of the owner's wife, even if it is equipped with a new key, the car can not start, you need to use the electronic instrument decoding Caixing electronic anti-start system, anti-theft feature in this.
Agents say, certain technical thief with the key to open the door is not very difficult, but with the key often can not start the car, should guard against thieves did you get the decoder, the owners of the remote control to open the door when the thief decoder access to the car's electronic identification ID, you can start the car. It should be noted that different brands have different models of the decoder, so the thief will often eyeing a certain brand car to start with, basically retain the large mainstream brand models.