This is a solar-powered emergency backpack made of high-density polyester Oxford cloth with a SETFFE laminate and a concave design to enhance heat absorption. The solar panel is made of high-performance monocrystalline silicon, which is waterproof, stain-resistant, and increases surface wear resistance.and increase photoelectric conversion rate by 24 It is also resistant to high temperature and oxidation There is an elastic mesh bag on the left side that can hold umbrellas and water bottles and a charging port and micro USB input on the right side USB output waterproof cover In case of rainy weatherThe backpack can also be charged with AC 220V. The thickened and widened shoulder straps are designed to balance and protect the spine, reduce shoulder pressure, and the elastic back pad promotes air circulation to keep the back dry. The bag adopts high-quality double zippers which are smooth and non-laggy to use.The bag has two compartments and three pockets inside for easy item classification and zoning storage. The zipper is equipped with a 12 watt 5000mAh battery with a display screen to recognize the built-in battery level. It is equipped with two USB dual outputs which can charge various devices such as mobile phones.户外电源、户外照明、数码相机等，满足您不同的户外需求