Solar-powered blinking light. Highly visible over 1/2 mile away (at night) for safety awareness in all weather conditions. Super bright amber LEDs flash 24 hours at frequency of 50 times/minute. Multi-layer sealed, waterproof and dustproof, UV stabilized. LED photocell switch: On: automatically turns flashing light on at dusk, and off at daylight. Off: continuous 24-hour flash. Easy to install on any 2" - 3" round, square or U-shaped signpost (not included). When fully charged, will run over 200 hours. Life expectancy over 100,000 hours. Working temperature -4°F to 120°F