This backpack releases hands and can be charged while walking. It has a large main bag, which can hold clothes, books, notebooks and personal daily supplies. Make sure it can stand up to capacity in any situation. Features: Can put in a 14-inch laptop. Large capacity main bag + multi-function combination bag. Anti-scratch nylon fabric, light and tough, wear-resistant and easy to wash. Dust proof and water proof. Free your hands so you can recharge while walking. Suitable for college work, leisure sports, entertainment travel and other occasions.