Bluetooth connectivity: Many models can connect with your smartphone via Bluetooth so you can use the company’s app to get more timely traffic alerts and weather updates and to receive destinations and routes from your phone.
We’ve found those fine for most uses, such as tapping on-screen buttons, but zooming requires that you use the plus and minus buttons on the screen, which is a little clunkier. Many GPS devices use a resistive display, which recognizes only one touch point at a time. This is particularly helpful for quickly zooming in or out of a map.
Multi-touch display: As with smartphones, the better GPS navigators have a convenient capacitive display, which lets you use multi-touch inputs. Wi-Fi updating: This handy feature lets you download and install map and software updates to your device over a Wi-Fi network, without removing it from the car, instead of having to plug the device into a computer and manually download the data. But none of them match the breadth of the traffic info in the Google Maps, Waze, or Apple Maps phone apps. 
Traffic alerts: When navigating along the major highways of metro areas, most GPS devices can give you alerts about traffic delays along your route and ask if you want to reroute. The systems of GPS devices, however, depend on saying specific commands, so they aren’t as conversational as Siri, Google Assistant, or Alexa. Voice control: A good voice-control system can make it quicker and easier to input a destination, control volume and screen illumination, get traffic and weather updates, and cancel a route by speaking a command. The 55 also provides helpful traffic info in many metro areas, responds to voice commands as well as the best GPS units, and like other top models includes free lifetime map updates-a contrast to the pricey updates you buy for many cars’ built-in nav systems. The DriveSmart’s extensive points-of-interest database helps guide you to an area’s best sites and businesses, with integrated TripAdvisor ratings, Foursquare listings, History Network sites, and US National Park directories, which other brands’ models don’t offer. Like the best GPS models, the 55 can also connect to a smartphone via Bluetooth, which lets you send destinations to the device, get incoming messages on-screen, and receive extra trip and traffic info. 
While the 5.5-inch screen is larger than on typical models-which have 5-inch screens-the overall unit is slightly smaller thanks to the 55’s sleek bezel-less design. And its multi-touch control is much easier for zooming in or out on a map than the typical GPS screen’s controls. The DriveSmart 55’s super-crisp 1200×720-pixel capacitive display is much sharper and easier to read than the 480×272 screen common on most similarly sized models.
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