3 Watts of Solar Power delivering 5V, 500mAh in direct sun. Providing direct charging via standard USB port Patented CIGS technology provides the highest power density to weight ration using the thinnest and lightest flexible solar panels on the market 30 Liter capacity Padded back, 2 side pockets, 2 main pockets (including 13" laptop compartment, multiple dividers Includes multi-way plug Micro USB, Mini USB and 30-pin Apple connector