cell:single-crystalline silicon (3v,75mA)
Storage battery: Ni-MH (1200mAH) / Super Capacitor (120F)
Light source: super luminosity LED;
LED quantity: 4  pcs                                                 
Luminous mode: varying type /Constant Type
Work time: 108 hours above for Varying Type; and more than 24 hours for constant type(standard    luminosity intensity)
Work temperature: -25 to +75 degree C.
Material of light:  Aluminum alloy and Polycarbonate
Resist compression: 30 tons                                          Waterproof grade IP>67                                               Life: >5 years (Ni-MH)  or >15 year ( Super Capacitor)               View distance: over 800m