Features: 1) Solar panel: multi crystalline silicon 2) Illuminant: 6 LEDs 3) Light colors: red / yellow / blue / green / white 4) Visible distance: 250 - 350m 5) Battery: 2 rechargeable Ni-Cd battery 6) Working hours: 60 hours (subject to 2Hz) after fully charged one day under the sun 7) If keep using, it could work 150 - 200 hours 8) Maximum resistance: 12 tons