Embedded Solar Road Stud NK-RS-X5. Hot-selling product,loading capacity more than 40 tons, can be used in the central of road,waterproof IP68. Power Supply: High Efficient Solar Panel (5V/60mA) Battery: Lithium battery (3.2V/500mAh) Size: Ф120*50mm(bottom) Ф135*50mm(upper). LED color :