product 1. Efficient: This charger only uses natural sunlight to charge your devices, such as charging your phone and Ipad at the same time, it is a green charger, no battery required, and it is not too heavy to carry. 2. Foldable and portable: The foldable design makes the solar panel charger smaller and easier to carry; 3. Compact to carry: Compact size. The light weight and slim design make it ideal for camping, hiking, picnics and other outdoor activities. Benefit from free solar power in a lightweight, foldable form that you can take anywhere. 3. Zipper bag design: Foldable zipper bag design, like books, will not damage the exterior of the solar charger in a humid environment. The wavy strap on the back of the solar panel makes it easier to transport, hang, install, remove and easily attach to a backpack, tree or tent. A soft exterior rainproof zippered pocket provides convenient storage for your devices, cables, gadgets. 4. Versatile, Durable and Superior Products