1. Exclusive Solar Technology: It can automatically adjust the current and voltage to achieve maximum power, delivering its fastest possible current up to 2.4A under strong direct sunlight 2. Dual-USB Power: 21 watt sunpower provides enough power to charge cellphone and ipad at the same time 3. Portable and frame design fits for outdoor and indoor use 4. Solar Power: 21W sunpower solar panel 5. Output 1: 5V 2.1A(Max) 6. Folded size: 300x 160 x 20mm 7. Unfolded size: 640 x 300 x 10mm

http://olla.gr/allpowers-5v-21w-portable-phone-charger-solar-charge-dual-usb-output-mobile-phone-charger/