Poweradd&trade; Highest Efficiency 19.5W Foldable Solar Panel Dual-Port Portable Solar Charger for iPhone, iPad, Samsung Galaxy Series Phones, Android Phone and Tablet, GPS Units, MP3, MP4, MP5, Bluetooth Speaker, Gopro Camera, PDA and other 5V USB-Charged Devices Highest Efficiency so far: Constructed with newly developed solar panels, up to 22% efficient solar array provides up to 2A output, easier and faster to replenish juice for your gadgets. Lightest weight and ultra compact: only the half weight of other normal solar panels on the market - 21.52 ounces. Folding size only 13.7 x 7.4 x 1.5 inches for superior portability. Uniqued voltage regulater to ensure stable current and protect your device while charging. Dual USB output design supports charging 2 devices simultaneously in 2A total. High quality polyester canvas for weather-resistant outdoor durability. Well-placed eyeholes enable easy attachment to backpacks (a free hook included) for use while on the go. Package contents: Poweradd&trade; 19.5W solar panel, hook, user manual (Micro USB cable not included).