The StrikeAlert HD Field Personal Lightning Detector is the ultimate outdoor safety tool, combining lightning detection and heat stress monitoring in one compact device. It tracks lightning strikes up to 40 miles away with full 360-degree coverage, giving you real-time awareness of approaching storms. Five color-coded LED indicators make storm proximity easy to read at a glance — green for power on, blue for 24–40 miles, yellow for 12–24 miles, orange for 6–12 miles, and red for 0–6 miles. The built-in heat stress monitor factors in relative humidity alongside actual temperature to display a true heat index, alerting you when outdoor conditions become hazardous. A bright color display and intuitive keypad make navigation simple. Measuring just 4.375" tall, 2" wide, and 1.125" deep, it's easy to carry anywhere, and the included carabiner clip keeps it within reach on all your gear. Backed by a 2-year manufacturer warranty, it's ideal for hiking, camping, sports, field work, and emergency preparedness.