NOCO XGrid XGS4USB 4W Portable Solar Panel and USB Kit Solar charging and USB battery pack kit; Store power during the day, and power your favorite devices at night with this 4W solar panel and 11Wh rugged USB battery pack kit Ultra-portable & rugged; Compact, lightweight and foldable matched perfectly with a durable design that is water, dirt and impact resistant (IP 65 rating); Stay charged; Charges any USB device including smartphones, HD action cameras, smart watches, GPS systems, MP3 Audio players, radios and more; Multiple recharges; USB Battery Pack charges up to 2X smartphones, 2X wireless speakers, 3X HD action cameras, 3X GPS, 6X MP3 audio players and more Designed for safety; The safest solar charging solution with reverse polarity, spark-proof, overcharge, over-current and short-circuit protection