Solar Panel: 2W/5V Poly Solar Panel Battery: 3.7V/2200mAH Li-ion Battery Light source: 0.5W x 4 piece white LED Hours of light with full battery: 35lumens, 17hours 75lumens, 10hours III: 150lumens, 6hours Input : Sunlight or DC 6. Materials: ABS and PC 7. Overcharge and over discharge protection 8. Shock-proof 9. Glow-in-the-dark button warranty period:1 year