Strike Alert HD Lightning Detector, Yellow 360Degree Lightning Detection  Unlike other lightning detectors, Strike Alert HD tracks lightning in ALL directions - there are no blind spots Storm Trend analysis  Now you can visually see the lightning strike distance and the 1-hour storm trend An audible and/or vibrate warning alerts you before (and while) lightning is within striking distance LED indicators light accordingly at lightning distances of 24-40 miles, 12-24 miles, 6-12 miles and within 6 miles Up to 80 hours of operation with two AA batteries