solar road stud

solar road stud HC-SRASolar cell: 0.3W poly-crystalline silicon Storage battery: Ni-MH (2.4V 750Mah)Light source: super luminosity LED;LED quantity: 2 to12 pcsLuminosity colors: red, green, blue, white, yellow (for any choice) Luminous mode: varying type or Constant TypeWork time: More than 7days for Varying Type; and more than 24 hours for constant type(standard luminosity intensity)