Use the power of Mother Nature to charge up with the AUKEY SunPower Solar Panel Charger. Coming in a compact foldable design, these panels unfold to capture the most amount of energy. The SunPower features three different solar panels and has a solar conversion efficiency of over 23%. With two built-in USB ports, you can plug your devices in directly to the panels for optimum charging. The ports are also super clever. They can identify your device and determine the most efficient and safest level of power. The SunPower is both weather and water resistant. With PET lamination, you can easily wipe the PVC fabric clean and dry. The SunPower is easy to fold up and take on all of your outdoor adventures.