Instapark Mercury 10 Solar Panel Portable Solar Panel Charger with Built-in Dual USB Ports for iPhone, iPad & all other USB Compatible Devices 10 Watts high-efficiency mono-crystalline solar panel with foldable design offers excellent portability, ideal for emergency preparedness, backpacking, camping and other outdoor activities Built-in dual USB charging ports for directly plugging in iPhone, iPad and other USB compatible mobile devices No additional battery needed for charging external devices, 100% green energy with zero carbon footprint Measures only 9 X 6 X 2 inches and weighs less than 1 lb 1-year manufacturers warranty