The Renogy 21 E.flex USB Solar Panel is a must-have for outdoor lovers, travelers, and off-grid users. Measuring 23 inches in length, 11 inches in width, and 0.8 inches in height, it weighs just 1.8 pounds, making it easy to carry around. With an energy conversion efficiency of up to 25%, it can charge your USB devices like smartphones, tablets, and cameras even in low light. Its dual USB ports let you charge two devices at once. It's built to withstand the elements and has intelligent chip technology for automatic device detection and optimal charging. Comes with 2 panels, a micro USB cable, a USB-A to USB-C cable, and 2 carabiners. Manufacturer's warranty covers parts and labor for 1 year.