"StrikeAlert II Personal Lightning Detector Pager. Finally, a lightning detector that is portable, inexpensive, and easy to use. The StrikeAlert personal lightning detector uses its patent pending technology to detect strikes out to 40 miles and lets you know if the storm is approaching or departing. No wonder StrikeAlert has been featured on CNN and NBC News. Lightning is the number one cause of weather related deaths ??? so play it safe outdoors! Whether you???re on the golf course, hiking or biking, or the kids are on the soccer field, use StrikeAlert to give early warning of the storm. Take lightning safety into your own hands."