Pioneer Car Audio Player

Car alarm, a device set up on cars, is employed for the security of cars. At present, it falls into four main categories in terms of its structure and functions: mechanical type, electronic type, chip type and network type. Each have their advantages and disadvantages, but the direction for car security is heading for high intelligence chip and network.

1. Mechanical lockMechanical lock is the pioneer and the most common one in car alarm lock. Nowadays, it usually works with electronic and chip type, mainly used to lock steering wheel and gear. The former one is frequently employed in cars and erase the trouble for installation. The latter is placed on the middle panel, connecting with car part and then limiting the motions of handle for shifting. This one is not commonly used in our daily life for its installation asking for drilling holes. What's more, there is another new type transmission lock, shaping as a shifting handle embedded. As we know, mechanical lock functions for limiting operations in cars. It is not enough to stop spades, saws and large-size shears from destroying. The point is that it can elong ate the period.2. Electronic alarm systemNowadays electronic alarm system is the most popular lock for cars, falling into one-way and two-way type. The main functions of one-way alarm system are alarms from opening and closing car door and vibration. Moreover, manufacturers add more practical function on it, such as starting and shutting down by remote control. On the other hand, compared with the former one two-way alarm system can thoroughly inform the driver of all the conditions. Any unusual will be alarmed and can be presented on the LED screen of remote control. The defect is the distance limitation of 100 to 200 meters. Furthermore, there is a worst trouble for it. Thieves hiding behind can decode the wireless radio wave or infrared rays from receivers or scanning machines used to start the alarm system.3. Chip-type digital alarmThis type alarms are increasing the popularity among latest cars and become one of the main original application over the development of car security. The basic principle of digital alarm is to lock car's motor, circuit and channel for oiling. Anyone can't start the car without the chip key. At the same time, there is low repeatability with passwords, eliminating the possibility of being scanning. At present, the chip-alarm has gone into fouth stage with special functions, featuring RFID. It can be employed to recognize the driver correctly and automatic operation with regard to the exact situation, such as closing the door when you are out.4. Network alarmNetwork alarm is involved with almost all the operations via network. You can open, close the door, start motor, locate cars and get reports about the present traffic condition far away from it. The mostly used network are wireless network and GPS. The most popular one is GPS, used for car anti-thief non-stop service. This system installed in the central controlling system, give us the precise longitude, latitude, speed and direction. Short messaging platform o f GSM network as a media transmits location information. But, we need to pay for the service and cost is not cheap. Moreover, IP network camera is coming into this system, doing a big favor to drivers.