BirkSun Boost Solar Battery Charger Backpack, Teal and Grey Use the power of the sun to charge your USB devices, like smartphones, GoPro Cameras, wireless speakers, Bluetooth headphones / earbuds, water purifiers, electronic cigarettes, etc. Simple to use, just plug, go and look good while you're sporting the latest technology High quality materials and construction, including the most efficient solar panel on the market Combine with a BirkSun Power Bank to capture and store the sun for later use Includes a 15" fleece laptop sleeve, organizational front pocket, and neoprene organizer sleeve