cell: single-crystalline silicon (3v,75mA)
Storage battery: Ni-MH (900mAH) / 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: Polycarbonate
Resist compression: 20 tons
Waterproof grade IP>67
Life: >5 years (Ni-MH)  or >15 year ( Super Capacitor)
View distance: over 800m