Portable Charging: Charge various devices - directly through dual 5V USB ports, designed for solar charging, and enjoy free unlimited power. Suitable for smartphones, song players, action cameras, and various USB-device charging. High-Effecient: With 14W of power and 23% efficiency, our backpacks have strong solar cells. In direct sunlight, the battery of your smartphone is fully charged in 2-3 hours. For environmentally-conscious charging at any time and anywhere. Large Capacity Design: The backpack has clear internal partitions and reasonable use of space to accommodate more equipment. The laptop compartment is separately padded and protects the laptop, notebook, tablet, etc. High-Quality Travel Bag: Made of high-quality wear-resistant and waterproof nylon with polyester liner, equipped with enduring metal zippers and sturdy shoulder straps, you can carry it with you for some sports or free travel. Widely Used: The S-shaped pad and mesh back design backpack provide breathability and pressure ease, reducing burden. The perfect choice for backpacking, hiking, fishing, riding, and also for daily use or occasional trips. Specifications: Material: Nylon Output: 5V/2.1A Power: 14W Color: As Shown Package Contents: 1*Solar Backpack