DE-Spark Handheld Emergency LED Solar Powered Strobe Warning Light, Road Construction Cone Traffic Light Flicker Beacon Lamp (Blue) 2016 New handheld warning light; Automatic charging in the daytime, automatic flash at night LED light control: super bright LED flash 48000MCD; Light visual distance of 500m Powerful magnets, Easy to install; wireless & weathproof Flashing frequency of 60 cycles/ min; 360  self-luminous light body Multifunctional warning lights: construction traffic construction, crane tower, vehicle, house ect.