Cozypony 14w Dual-Port Solar power Foldable Portable Charger for Laptop, Smartphones, Mp4 and Mp5 Devices Built-in smart chip: It has unique automatic start function controlled by software.On cloudy days the solar energy stops working, when it become sunny, it does not need to plug any button, would automatically resume work controlled by software. Easy to use: Unfold the Cozypony solar panel under direct sunshine, connect your device to the USB output port. Compact size: (7.48 x 6.3in folded / 21.65 x 7.48in opened) and well - placed eyeholes allow easy attachment to backpacks while hiking. Rugged quality: The panels are faced with industrial-grade PET plastic and bound together using heavy-duty polyester canvas, equipping this solar array with ultimate weather-resistant durability. Package contents: Cozypony Foldable Solar Charger, USB to Micro USB cable