Fabric: 600D shell made from recycled PET (soda bottles), UV resistant PU, and sandwich mesh back, inside pockets use PET mesh Weight: 2.9 lbs (1,300 grams) including battery and solar panels Dimensions: 18" high x 11-12"wide x 3-4" deep (46cm x 27-30cm x 7-10cm) Volume: 600 cubic inches (10 liters) 4 Watts of Solar Power: From three tough, light weight, waterproof solar panels 4-6 hours of direct sunlight produce enough charge to fully charge a typical cell phone - see charging times Battery Included: 4,400mAh at 3.6 volts Li-Ion battery pack with 3 voltage settings to store solar power When not in the sun, the battery can be charged using the AC travel charger or DC car charger making it just as useful on the grid as off 11 standard adaptors for easy connections to common cell phones and universal plugs Note: It is not designed to charge laptops, it will however charge cell phones, sat phones, PDAs, GPSs, iPods, cameras and most other handheld electronics Indicator light inside the logo shows when the panels are generating a charge