Aluminum Solar Road Stud: Model Number: SRS-004: Color. Yellow, Blue, Green and White: Material: Aluminum alloy and polycarbonate: Solar cell: Poly-crystalline silicon/single-crystalline silicon(3V, 75mA) Storage battery: Ni-MH (1200mAH)/super capacitor(50F) Light source: Super luminosity LED: LED quantity: 6 pcs or 3pcs: Luminous mode: Varying