Solar Road Stud. Solar Road Stud,road stud,solar stud,reflective road stud solar road marker,lane marker . Solar Road Stud S-1722 Material: Aluminum alloy shell and clear PC cover Size: 140x130x91mm Storage Battery: Ni-MH(1200mAH) CELL: single-crystalline silicon(3V,75mA) Light sources: 4pcs super bright LEDS LEDS colors: yellow,red,green and blue Working time: over 108 hours (flashing mode