The highly visible "Safety Alert" wireless flashing solar strobe light features a simple unit with an on/off control that will recharge in either the "on" or "off" position. Operating at a light intensity of 4.1 candelas, the RoDon solar strobe has a full 360-degree horizontal nighttime visibility of more than two miles and is capable of flashing 60 times per minute with a lifetime expectancy of 100,000 hours and battery function of 5 years before requiring replacement.