poly-crystalline silicon / single-crystalline silicon (2.5V,140mA) Storage battery: Ni-MH (900mAH) Light source: super luminosity LED; LED quantity:3pcs Luminosity colors: red, green, blue, white, yellow (for any choice) 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 years (capacitor) View distance: over 800m Guarantee period14 months