Ambient Weather LD-3000-WS-HE01-KIT Handheld Strike Alert HD Lightning Detector and Heat Stress Monitor Safety Kit The Strike Alert HD Lightning Detector and Heat Stress Monitor Safety Kit combines two of our most important safety devices for field workers exposed to heat and lightning. Built on the trusted StrikeAlert technology, StrikeAlert HD is the first personal lightning detector with a graphical display that shows you the lightning strike distance (form 0 - 40 miles away) as well as a 1-hour storm trend and intensity. Most other personal lightning detectors offer only 180 tracking, but StrikeAlert HD offers complete 360 tracking - in all directions, so there are no blind spots. The Ambient Weather Portable Heat Meter features an easy to read arrow display showing all ranges of dangerous heat conditions. The adjustable, audible warning sounds before heat index reaches critical levels.