NOKIN Green Solar Road Stud For City Road A6-1 Material is Aluminum+PC. Power supply is Monocrystalline solar panel 2.5V/120MA for NI-MH. Battery is NI-MH 1.2V/ 600mah (high temperature resistance); Lens is PC. Solar Road Pavement Markers LED IS Ultra bright diameter 5mm (6pcs). LED color is Red,Yellow,Green,Blue,White.