Automatic system test when first turned 'ON' assures you that the system is working. You get 25 miles of early warning range when sensor is mounted 10 feet above ground. Just mount the sensor 20 feet above ground for 45 miles range. Just mount the sensor 7 feet above ground for 15 miles range. The alarm sounds 3 seconds for each unseen lightning flash.
Severe storms cause continuous alarm.
Alarm automatically resets itself after each lightning flash. Warns of approaching lightning storms and rainy weather. Detects severe storm frontal zones hours in advance. Senses magnetic fields from invisible lightning. Unique offset sensor pattern lets you find the direction of distant severe thunderstorms by slowly rotating the unit until detections are most frequent.