With the Sandberg Solar Charger, you'll always have power when the sun is shining. The highly efficient panels generate 40W, allowing you to charge your smartphone, tablet, or power bank directly from the panel's controller box. Easy-to-mount carabiners are included, making it simple to attach to your backpack or tent. This is green power for all your adventures far from the power grid. The solar panel is waterproof, well-crafted, and super lightweight at only 900 grams.