SkyScan Storm Detector 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 60 Km (40 miles) away and accurately ranges its approach, by both and audible tone and by four LED’s which are ranged in kilometres: 0-5 Km, 5-15 Km, 15-30 Km, 30-60 Km, (and in miles: 0-3, 3-8, 8-20, 20-40). Displays in Km and Miles.