Feature: 1. Solar Power: The solar panel absorbs solar energy, efficiently converting it into electricity to charge your smartphone or other small devices. When your phone is low on battery, you can use the USB connection on the backpack. 2. Large Capacity: This backpack is a great companion for outdoor activities, with enough room to accommodate your 14 inch laptop, camera, clothing, food, water bottle, small utensils, magazines, tablets, smartphone, sunglasses, umbrella, sanitary napkins, lipstick, and other cosmetics. It can also carry a digital SLR camera body, 3‑6 additional lenses, and accessories. 3. Waterproof Oxford Cloth Material: Water resistance to keep anything inside from getting wet. Equipped with durable metal zippers and a comfortable handle, this backpack reduces pressure on your arms when holding it. 4. Sturdy Shoulder Straps: The breathable elastic shoulder straps and back provide additional back support, ensuring a comfortable feeling. 5. Solar Charger Backpack: Enjoy free unlimited on the go power with solar charger backpack, perfect choice for any outdoor enthusiast. Perfect for photography, backpacking, trekking, mountaineering, fishing or biking. Specification: Item Type: Solar Backpack Material: Oxford Cloth Weight: Approx. 1171g / 41.3oz Solar Panel: ETFE Lamination Technology Conversion Efficiency: 24% Max Power: 12W USB Max Output: 5V 2.1A. Package List: 1 x Solar Backpack2 x Compartments Note: Without power storage function.