1. CHARGE AUTOMATICALLY：Solar road stud absorbs the unlimited and free power from the sun about 6-8 hours to supply the LEDs up to 72 hours. It will automatically charge during daytime and illuminates when night falls or with the onset of inclement weather. It is not only environmental protection but also saving money, continuous solar energy does it for you. Thank you for your help for earth!
2. IP68 WATERPROOF: Solar road stud is certified with IP68 and 100% waterproof, the tightly sealed battery compartment can withstand most kinds of environments, no rusting, durable all year round.
3. HARD SHELL: Solar road stud is made of high quality poly-carbonate which means that it will not be damaged even the car or truck run over it, and it can withstand 20 tons of pressure, hard enough for any road. Each light has 6 premium quality LEDs which gives out a visible super bright and steady light for more than 875 yards.