According to statistics from foreign car safety professionals, the traffic accident death rate is 13% for motorists who are taking phone calls, and only 4% for other motorists. In addition, the vehicle speed is In the case of 110 km/h, the braking distance of a normal driver is 31 meters. The driver who has an alcohol content exceeding the standard brake distance is 35 meters, and the driver who receives the mobile phone has a braking distance of 45 meters. For many busy owners, many important calls have to be answered when driving. Car radio is a good choice. The mainstream car phone products currently on the market are broadly divided into two categories: one is a pick-up vehicle-mounted wireless headset; the other is a fixed-car speakerphone. Fixed car handsfree Telephones of this type are fixed in the front center armrest. Compared to pickup-type wireless headphones, their sound quality is relatively good, but the price and installation are more difficult than the latter. Usually the installation costs range from a few thousand to over ten thousand yuan. Its call effect is relatively good, even in the compartment with large shielding and electromagnetic interference, it can still maintain an excellent call effect. According to reports, the received signal performance of this type of car phone is 25% higher than that of the mobile phone to which the wireless headset is connected. In combination with a dedicated car antenna, it can maintain a clear call effect even in the extremely weak signal environment of many mobile phones. At the same time, it can also be switched automatically with the car audio system. That is to say, once the phone arrives, the original music in the car stereo will be suspended. Pickup type wireless headphones The principle of this kind of telephone is very simple. It uses the mobile phone of the owner to receive the communication signal, and then uses the pickup to collect the sound of the mobile phone and plays it through the on-board broadcasting system or the car stereo. The owner wears a wireless headset to answer the sound. Professionals have a phrase to describe such wireless headphones: "On the car is the car, get off the phone," it is very lively. The main part uses a cigarette lighter as a socket. After installation, the device terminal will automatically switch to the hands-free mode, and the connection will be connected with the headphone jack of the mobile phone. This type of car phone installation is very simple, no professional installation, it can be said to be ready-to-use, and thus the price is much cheaper than the car fixed telephone system, the market price of 300 yuan to 700 yuan range. At the same time, its control of electromagnetic radiation is relatively less than that of a fixed-line telephone system. Therefore, the sound quality and the audibility are not as good as those of the latter.
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