Solar cell: Crystalline silicon 4V/100mA Storage component: Ni-cd AA 2pcs 1.2V/1000mAh battery; Ni-Mh battery available Light source: 2pcs of super bright LEDs Power of consumption: 0.05W Color of light: Red or Amber Flash frequence: flashing 60+3 times/min (adjustable) Constant burning mode available Work Temperature: -20 to +60 centigrade degree Work Time: over 12hrs after 1 sunny day's charge, 3-5 nights contineously if fully charged Visible distance: 650-700 m IP rate: IP66 Product size: 165x320mm N.W.: 0.44kg