For any person who bought a car, it is important to protect it from theft or from the theft of the things that are there. To reliably protect your car, you need car systems. Currently, the car market offers many alarms. Among this variety, you need to choose the effective protection in which you will be sure. Some manufacturers supply alarms with different functions. One of these functions is autostart. By clicking on the button, you can start your car. It is very convenient in winter. Another means of protecting against theft of your car is an immobilizer. This is a reliable and proven tool that blocks your car without a key. If you have an immobilizer in the car, then not a single thief can hide your car. The most important for car as signaling is a sonorous siren, which enables the owner to hear that his car is trying to hide. Such a siren can even scare off the car. Today, such auto -signals are installed in Korean cars. For car systems, you can buy a sensor that protects your car as a whole. The sensors are different:- a movement sensor that reacts to an attempt to move the car from the place;- a volume sensor that responds to movement inside the car;- a combined sensor that combines two sensors: a volume sensor and a movement sensor; He reacts to approaching him, to penetration inside and moves from the place;- a glass breakdown sensor, which when connected to car systems, and when breaking the glass, the sound signal issues;- and many other sensors.