The Sandberg Foldable Solar Charger is a highly efficient solar panel that converts sunlight into electricity. It has 2 USB outputs that can be used to charge your USB devices, such as smartphones, tablets or power banks. By connecting it to a powerbank, you can store the electricity there for charging your smartphone later, or use it as a stabilising... intermediate piece when charging (if your powerbank supports simultaneous power inputs and outputs). The USB outputs are in a handy zipped pocket with enough space for your USB device. The included carabiners can be used, for example, to attach the solar panel to your backpack when you go on an adventure. That's environmentally friendly energy for your devices!