When buying a GPS Device, there are some important features that you should consider as well as additional options that you may want.

Here’s a list of some features you might want to think about:

1. Accuracy: Most GPS units are amazingly accurate these days, at least when it comes to calculating your exact coordinates. However, businesses and streets are forever changing, so some of that that information might be incorrect unless it has just been updated. With some of the less expensive GPS products there is a risk that the price reflects the fact that the mapping data is out-of-date – so check before you buy. You also need to ensure that the vendor gives you regular updates to the maps and POI lists. Find out how much these updates cost – some vendors charge as much as $100 per update, while others give them gratis for a fixed time, or for the lifetime of the unit. In addition, for certain GPS models have online communities where you can share and download mapping and other information.
2. Usability on the go: When you are driving, your GPS can distract you even more than your cell phone. For your safety, it is vital that the maps are clear and simple to read. This requires high quality graphics and an uncluttered screen with only the necessary visuals. The touch-screen controls also need to be logically arranged and quick to use. With some models, you can easily add in a stop along the way, while with others that takes a bit of re-programming.
3. Reflective screens: In bright sunlight, it can be impossible to read the map on the screen. Many high-quality devices feature a reflective coating behind the screen, so that you can see the display clearly even if the sun is shining directly onto it.
4. Mounting kits: To use your GPS in the car, you will need a mounting kit with a strong bracket, as well as adaptors for both AC and 12-volt power. In certain states, you are not allowed to mount a GPS on your windshield – make sure you know the laws in force where you live before spending your money. You can probably get a different type of mount – one that uses beanbags or fits into the air vent, for example – from your GPS merchant.
5. Power supply: An in-car GPS is designed to plug into the vehicle’s 12-volt power outlet. If you are out in the wilds, you need a battery-powered handheld GPS unit. If you only plan to use it for short walks, you should be fine with one that runs on an onboard rechargeable battery. However, a model that takes replaceable (and ideally rechargeable) AA or AAA batteries will keep you going for many hours or even days. Many smaller handheld devices can only last 4 or 5 hours on the two AAA batteries they use. A bigger unit might run on up to four AA cells, which are bulkier and heavier but provide as much as 12 hours of power.
6. Weight: For an automobile GPS, weight really doesn’t matter. It is, one the other hand, an important consideration when you are selecting a handheld model. Portable devices can weigh anything from a couple of ounces to almost a pound – and don’t forget to add the weight of your extra batteries.
7. Dead reckoning: In a city with a lot of highrise buildings, GPS signals can have a hard time getting through to your device. In that case, you won’t get an accurate reading of your location, and you might end up missing a turn or getting completely lost. Some of the more high-tech models have a feature known as dead reckoning that is meant to overcome the problem by using interpolation to compensate for the signal interruptions. The unit uses your speed and direction to keep the map updated; however, this technology is still not very accurate.
8. FM transmitter: In some GPS units there is an FM transmitter that sends spoken directions, music and any other audio to your car stereo. This gives you the best sound quality.
9. Bluetooth: These days, Bluetooth connectivity is becoming standard on high- and medium-priced GPS units. This feature allows you to hook your GPS up to a Bluetooth-enabled cell phone and use the speaker on your GPS for hands-free phone calls.
10. Internet connectivity: As yet, only a few models let you log on to the internet. With this rather convenient feature you can look up addresses on the web and send them to your GPS. You can also search for useful information like gas prices in your area.
11. Media players: You can’t watch a video or movie when you are driving, but your passengers might want to. You can always listen to some music, though. Several of the pricier models let you insert a card with stored music and videos, and some will also show photos.
12. XM Radio support: High-end GPS devices sometimes support XM Radio subscriptions. While you don’t need XM Radio to get around, it can be good company if you spend a lot of time in the car.

GPS Buying Tips:

• Introduction
• Some Basic Facts
• What is GPS & How Does IT Work?
• The Most Important Features
• Other Features You Might Want