With a small size of 425x285mm / 16.73x11.22inch ( when folded) and a light weight design that can be easily squeezed into your backpack, offering portability and simple It can charging directly cell phones,, usb, flashlights, tablets, watches, headphones and other mediums small usb electronic devices in the sunlight mobile camps and off-grids adventures, the 40W foldable solar panel is perfect for longer trips when you need more power without sacrificing portability Our solar panel make of the cells with monocrystalline can effectively convert solar energy into green electricity needed by human being and the conversion rate is up to 21 Easy to use: Just unfold, angles toward the sun, and connecting, it ’ s that simple to start powering your devices ( Note: this folding solar panel can ' t store the electricity, Manufacturer: JDNH