Sat-nav firm Garmin has made a portable head-up display (HUD) for cars that projects turn-by-turn directions on to a vehicle's windscreen.
The portable HUD works with a smartphone and Garmin app to generate navigation information.
The gadget can project directional arrows, distances, current speed and speed limits on the windscreen.
Information is projected via the HUD's attached reflector lens or on to a plastic film stuck to the window glass.
The navigation system can also provide voice prompts via a smartphone's speaker or a car stereo that works with the Bluetooth short range radio technology. The app associated with the sat-nav system is available for iPhones, Android phones and Windows Phone 8 handsets.