This Strike Alert Personal Lightning Detector provides early warning of lightning strikes as far away as 40 miles.

• Personal and portable lightning detector.
        - Strike Alert M747
• An audible alarm sounds and a corresponding LED illuminates accordingly as lightning strikes.
        - Distances within 6 miles, 6-12 miles, 12-24 miles, and 24-40 miles.
• Indicates if lightning strikes are approaching or moving away.
• Low power consumption. 
•       - Up to 100 hours with two AAA batteries.
• Easy to use.
        - Flip a switch to check lightning strike distance.
        - Track storm direction.  View battery life.