Over the past hundreds of years, GPS navigators have become very important for most motorists, for travelers or people who are trying to navigate in the city. Hundreds of thousands of people managed to evaluate the advantages of satellite navigation, because it is now considered the most accurate determination of the location. And now using the GPS navigator, users quickly and conveniently lay numerous routes for traveling by car or walking on foot. But those who are faced with the need to purchase a GPS navigator for the first time, the choice is a large. Moreover, the market for navigators is very large and to understand the huge number of models to a beginner is not at all easy. To begin with, we will consider the features of the navigators. At the moment, there are approximately 30 satellites in space, who work with navigators. One navigator sends approximately three satellites simultaneously signals, on the basis of which he then has the opportunity to determine their own location. The use of the navigator is completely free. And the more points that the navigator can contact, the belt will be more accurate coordinates of its location. When choosing a GPS navigator, it is important to evaluate the software of the device, the size of its screen and resolution, the processor power and the volume of navigator memory. The duration of its autonomous work, the dimensions of the device and weight, convenience, strength and tightness of the case also matter. If the navigator is necessary for the car, then pay attention to the methods of its fastening. Many also take into account the presence of functions of additional and entertainment.