Lightning detector.
Lightning Detector, Ranges 0 To 6 Miles, 6 To12 Miles, 12 To 24 Miles And 24 To 40 Miles. , Audible, Visual And Vibration Alarms, Height 3-1/4 In. , Width 2-1/8 In. , Depth 1 In. , Weight 6 Oz, Power Source (2) Aaa Batteries required, Carabineer
From the Manufacturer
This personal lighting detector give early storm warnings, storm direction and various distances of lighting up to 40 miles away.