We have found a rather unique device for those long road trips. The Wayfinder Z7500 has a digital compass with graphic heading indicator, an atomic clock with time and date, an altimeter, and barometer. It will also forecast the weather for the next 12 to 24 hours. With a backlit screen for night time viewing, the device mounts to your windshield by suction cup, and runs on an included lithium battery. The Wayfinder is available for $89.95.