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Navdy calls its heads-up display “the world’s first augmented driving device.” While that’s a bold claim, the Navdy is pretty remarkable. The housing mounts on the dashboard above the steering wheel, and has a 5-inch wide by 2-inch tall transparent lens, putting its display in the bottom of the driver’s line of sight. A built-in GPS chip and antenna work in concert with sensors to determine your vehicle’s location and direction. The “Navdy Dial” attaches to the steering wheel, and you use that as your primary interface with the screen. The Navdy ($500 from Amazon) also responds to hand gestures, so you can make genuinely hands-free phone calls.