1. Fashion, energy-saving, environmental-friendly. 2. Can directly plug in iPhone, iPad and other 5v USB compatible mobile devices. 3. High conversion efficiency over 90% of solar charger controller from MegaSolar vs <80% conversion efficiency in the market. 4. Excellent controller performance against changing weather. Auto restart during sunny-cloudy-sunny weathers. 5. Plug and Play, simply use. 6. Compact & foldable design, light weight. 7. 4w 6w 7w 10w 15w 20w or others available. 8. Black, camoflage, and more colors. 9. Customizable.