You need to know that GPS systems available today are not very expensive. They usually cost around $300 to $800 at the most. If your price range falls between these two extremes then buying a reliable GPS system will not be that difficult for you. Remember that a GPS system will not be able to provide you with everything you want. You will have to sacrifice on one area or another. For example, one GPS device might be designed to provide only maps, while another might provide visual display as well as voice directions. Both these systems could differ from each other in size, weight, cost and quality. So you should make up your mind before buying it that this is exactly what you want.

After deciding your budget you should read the user reviews and other information a manufacturer provides. See if the features suit your needs. You will need to carefully study the specifications of a particular system. GPS devices also differ in shapes and the size and display type of the screen. If you want a GPS device for your automobile, then look around for a car GPS system. Some of these automobile GPS systems are handheld and can be used for other purposes as well. However, handheld GPS devices are a totally different branch of systems. Other than these two, marine GPS systems are also available and they have their own features.

Popular GPS brands are Garmin, Magellan, TomTom and Lowrance. If you want the latest GPS technology, then Garmin should be the first and foremost preference. Garmin products are available for government purposes as well as for civilians. Magellan is the pioneer of handheld GPS devices. Their products are very reliable and their goal is to provide the best solutions to their customers. TomTom is again a popular name in the GPS industry. They are dedicated to providing all-in-one navigation services to their customers. Their products are mainly aimed at mobile technology and how to integrate the existing technologies to come up with better and more reliable systems. Lowrance has been a trusted name in the field of global positioning and mapping instruments since 1960.

The next thing to consider is whether you are going to need it for your car or you want to carry it around in your pocket. If you are planning to go on a hiking or trekking trip, then looking around for a light-weight GPS device will be very helpful. Some features such as the quality of being weather-proof and water-proof are also needed for special purposes. Also make sure the battery life is reliable. Color display and backlight screen capabilities are to be studied carefully because you never know where you might need your GPS device. A 12-channel receiver system is recommended in any GPS device so that it is able to receive signals even in great obscurity. Weatherproof systems are mostly used for marine tours. Back-tracking capability is sometimes needed in adventurous tours in the woods or rock climbing. For use in an automobile a big display is something you should prefer because if you are driving alone you might want to have a look at it while driving. GPS systems with voice capability are also suitable to be used in cars.

All in all you should consider your budget, needs, the kind of tour you are about to go on, and other features different GPS systems have to offer before buying a device for yourself.