SkyScan is the newest and most exciting weather product available anywhere in the world today. It is a hand-held instrument with the electronic sophistication to detect lightning as far as 40 miles and accurately ranges its approach, by both an audible tone and by four LED's which are ranged in miles (20-40, 8-20, 3-8, 0-3). This feature tells the user if the storm is moving away, or parallel to their position.