By
eHow Electronics Editor
Difficulty: Moderately Easy
Step1
Examine what you'll be using a GPS for. For vehicle navigation, choose a model that includes a large, easy to read screen and gives voice guidance so you don't have to take your attention off of driving. For trekking on foot a hand held model can be a convenient choice because of it's small size. Airis offers GPS for vehicles and a GPS/PDA for a highly portable unit.
Step2
Consider how you'll use a GPS. For road navigation Airis GPS includes door-to-door route planning and an overview of upcoming vehicle maneuvers and distances shown on the screen. Depending on which software you load on PDA you can access street maps or terrain maps and find your way in the urban jungle and country side.
Step3
Think of which features you need and how much you can spend, then figure out which model would be best for you. The Airis T620 PDA Navigation is a PDA with embedded GPS, Wi-Fi and Bluetooth that costs about $500. The Airis Portable Navigation Device is the choice for vehicle navigation and costs about $350.
Step4
Search out more information by looking online at websites where they have reviews, analysis and recommendations.
Step5
Be a smart shopper by shopping around. Compare retailer's prices and check for rebates and deals on refurbished products and discontinued models.