Body materials: rustproof aluminum Solar panel: 0.4W 3V Capacitor or Rechargeable battery: Ni-Mh 1.2V, 1,600mAh LED: super bright LEDs (diameter: 8mm), 2 x 2 pieces (double sides) Light mode: flash Product size: 135 x 130 x 27mm Resistant compression: 30 tonsIP: >68 View distance: >1,000m Compression resistance: 3,306lbs/in Heat resistance: -25 to +75oC Light intensity: 6,000 to 10,000mcd