Renogy 14W E-Flex Solar Power Panel with Dual USB Ports The E-Flex features two USB outputs, allowing you to charge more than one item at the same time. With this 14W panel, you can charge a variety of digital devices such as MP3 players, cameras, tablets, Bluetooth speakers, and smartphones. Dual-port USB outputs for charging two devices simultaneously. Water-resistantfoldable and portable for on-the-go applications. To enhance your user experience, we recommend you pair this product with a power bank. To enhance your user experience, we recommend you pair this product with a power bank