Published: May 2007
Spectrum’s ThunderBolt portable lightning detector has a storm and lightning detection range of 75 miles (120 km in metric version) and a detection frequency of 10 kHz. Warning modes include text messages via a 2-by-16 LCD screen, red LED warning light and an audible tone. It automatically displays ranging, storm approach speed, ETA at user location, time to clear and sever storm/squall line detection. It measures 6.4-by-3.4-by-1.5 in. and weighs 14 oz.
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