The RYOBI 21W Solar Panel has the innovative technology to charge USB devices directly from the sun. Whether you’re hiking, tailgating or doing any outside activity and have a clear view of the sky, you will have the power you need to charge any small electronic device with the 2 included USB-A output ports. Need to charge your RYOBI 18V ONE+ battery? Simply plug in a RYOBI inverter with battery charging capability. The foldable panels and lightweight design make this tool effortless to take anywhere and compact to store practically anywhere.