Waterproof, Energy-saving and Environmentally Friendly Road Stud with Solid Aluminum-alloy Shell Powered by Solar Cells and Panels, Ideal signal products for highways, parking lots, roads and similar isolated or stand-alone traffic applications Specifications: 1. Aluminum-alloy shell 2. Transparent plastic shell 3. Solar panel (2.4V/0.15 to 0.3W) 4. One Ni-Mh or Ni-cd rechargeable battery (1.2V/1,200Ma) 5. PCB with over-charging function 6. Six Super bright LEDs 7. Light intensity and view distance: 8,000 to 10,000mcd and over 300m 8. Frequency or flash rate: 2Hz or according to customers requirements 9. Working model: Steady lighting or Flashing. depends on your requirements 10. Bearable weight: 9 Tons 11.Color: yellow, red, blue ,green, and white 12. Working time: 50 to 60 hours successively after the battery is fully charged 13. Charging time: five to six hours/day 14. working temp: --40 degree ---- + 85 degree 15. Life time: three to five years 16. Warranty: one year 17. Easy installation, no maintenance 18. Saves power, no additional expenses, environmentally friendly, no pollution 19. Solar energy-based power source 20. Brightness sensitive auto-switch, automatically turns on at night and turns off at dawn 21. High visibility LED's help ensure easy and safe night driving 22. Ideal for highways, parking lots, roads and similar isolated or stand-alone traffic applications 23. Suggest to put them on the road side or middle protection line in order to have less damages to the solar panel surface