Anker® 8W Single-Port Portable Foldable Outdoor Solar Charger with PowerIQ™ Technology PowerIQ™ technology intelligently communicates with connected devices to maximize both compatibility and charging speed up to 1 Amps under direct sunlight. 8 watt monocrystalline 15-18% efficient solar array provides up to 5V / 1A total through one charging port. Industrial-strength PET plastic faced solar panels sewn into high-wear polyester canvas for weather-resistant outdoor durability. Folds down into a 8.5 x 11 paper-sized profile for superior portability; well-place eyeholes enable easy attachment to backpacks for use while hiking. Package contents: Anker® 8W Foldable Solar Charger, welcome guide, 18-month, hassle-free warranty.