1.[Widely compatible] Dual USB ports allow you to charge two devices at the same time, especially the QC3.0 port, which can support a maximum 18W fast charge output. The DC5521 port has an output voltage of 18V, and it can support laptops, tablets, digital cameras and other devices with the included 10 adapters. It can also charge low-power portable energy storage devices . 2.[High conversion efficiency] Equipped with 4 large-area monocrystalline solar cells, and covered with EVA and PET composite materials with better light transmission, the energy conversion efficiency is as high as 22.5%. 3.[ and durable] It is made of durable polyester fiber and durable EVA-PET composite material with high-strength composite board support material and solar panel. Rugged and durable body, can withstand harsh environments and waterproof (the waterproof standard of the solar panel part is IPX4, even if it is wetted by sudden rain.), it is ideal for outdoor activities such as camping, climbing, hiking and picnics choose. Note: The junction box is not waterproof, please keep it dry. 4.[Folding and portable] Foldable solar charger: small size (only 10.6 x 7 x 1.8 inches after folding or 39.76 x 10.6 x 0.8 inches when unfolded). The foldable 30W portable solar charger is suitable for outdoor activities such as camping, hiking, and mountaineering. The weight is 900G. Equipped with 2 stainless steel hooks, you can also use accessory hooks to hang them on your backpack while walking. 5.[Safety protection] Solar panels have passed FCC certification. Short circuit and surge protection technology can ensure the of you and your equipment.assed RoHS and CE certification. Short circuit and surge protection technology can ensure the of you and your equipment.