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