cell:  single-crystalline silicon (4v,200mA)
Storage battery: Ni-MH (2*1200mAH) / Super Capacitor (2*120F)
Light source: super luminosity LED;
LED quantity: 5-6 pcs                                                  
Luminous mode: Constant Type (standard    luminosity intensity)          Work time: more than 30 hours
Work temperature: -25 to +75 degree C.
Material of light: Polycarbonate
Resist compression: 20 tons                                          Waterproof grade IP>67                                               Life: >5 years (Ni-MH)  or >15 year ( Super Capacitor)               View distance: over 800m