The installation height of cell phone jammer should be more than 2 meters

It means the cell phone cannot be used for cell phone jammer is used.
It is no longer a rarity in a fantasy, but one that can be used to save time and money and popular tool. With the large-scale use of PND, its price is constantly reduced, consumers have been able to afford the PND products, no longer need each other to borrow, and even some users also bought a second, the third product in order to facilitate a variety of occasions. As a single-purpose devices, PNDs is most suitable for its designed products. On navigation, it is very good. But these less expensive system with some accessories, and more accurate to say that is the wires and suction cups. The smart phone navigation is not a new concept, with a development application store. As a multi-function devices, smart phones provide a convenient access for many applications. The instant map is "free", these phones are not cheap. When the customer does not need to use cell phone jammer or wants to use the cell phone.
If we count the cost of network, a smart phone may be greater than a PND is many times more expensive. In addition, the experience of the navigation features of these devices may be greater than specialized navigation equipment worse. The small screen and poor adjustment interface may distract drivers' attention. The integration of these applications are often poor, the result may conflict with other functions in the phone. The smart phone navigation is perhaps best suited for users who do not often use or temporary use of the navigation function, it is pedestrian, is also a good choice. Embedded navigation system most suitable to provide more convenient navigation service. The device are generally embedded in the car, you can provide voice trigger interface, thereby reducing driver distraction. The vehicle data for other services provided for convenience. cell phone jammer needs the power supply to switch on the host.The installation height of cell phone jammer should be more than 2 meters
Such as shortest route, the optimal driving scheme, which not only reduces the travel costs, and improve driving safety. Same time, all of these facilities has also brought a higher price, and attached to the car costs. In addition, it is also found embedded navigation devices, sales of motor vehicles will grow by 16 percent. The value of personal navigation devices still exist in the past 18 months, the performance of the PND and smartphone industry to differ materially. Despite the economic crisis began in the second half of 2008, but Canalys company estimates that in 2009 the total shipments of smart phones to exceed 166 million units, of which 81% of mobile phone has an integrated GPS.