This device keeps you safe by detecting storms up to 75 miles away. -- It calculates storm approach speed (accurate to within 10%), storm range (accurate to within 5-10%) and strike probability. -- As the storm nears, its speed and range are continuously updated along with an estimate of its arrival time in your location. -- Warnings are delivered via a 2-line LCD display, red and green LEDs, and an audible alarm. -- Powered by 1- 9V battery (included) or 120V AC adapter (not included). Measures: 6.4" x 3.4" x 1.5". Weight: 14 oz. |