The speedometer is a good thing, except that it’s not always conveniently located - you have to take your eyes off the road. On an empty track it does not cause problems. But in a dense stream for the second when the eyes do not follow the road, you can wrinkle well. Can this be avoided? Yes you can, if you use the car GPS-display HG400 Heads Up Display. The device is mounted on the windshield, powered by the cigarette lighter and shows the current speed and direction of the route. True, in order for the turns to appear normally in reserve, you still need to have a smartphone, a navigator or a laptop with a GPS adapter. Communication between devices is via Bluetooth.