These solar LED road studs are naturally charged by the sun. As soon as it starts getting dark the LED lights in the stud come on automatically each night for up to 10 hours. They have been specifically designed with road safety in mind and can help to prevent serious accidents and emit rather than reflect light. Solar LED Road Studs are also known as solar raised pavement markers、 solar reflective lane markers and solar warning devices. Features¡êo1. Extra bright 6 LEDs 2. Luminous mode: constant type 3. Visual distance of more than 850 yards.4. Automatically starts to work when night falls or with the onset of inclement weather5. Solar panel and rechargeable Ni-MH battery (1XAA1200mAh) included6. Maximum load/compression capacity: >30 tons7. Provides up to 10 hours of light8. Dimensions¡êo10.8x10x2.8cm (LxWxH)9. Temperature rating -35~80??10. Waterproof Rating: IP6811. Weight: 312gPackage Included:1 x Solar Powered White 6LED Outdoor Road Driveway Pathway Stair Security Lights