<ul><li>1. OPERATION OF USB CHARGING - Connect your usb power bank with the USB port inside and connect your phone with the USB port outside.2. EXTREMELY SPACIOUS - Features 1 padded 17 - 17.3" laptop compartment;1 main compartment placed 3-4 days of clothing and 4-5 books;1 padded sleeve;2 pouches for mouse and charger;1 front electronic gadgets organizer pocket;1 back anti theft passport pocket;2 exterior quick access notebook pockets;2 side water bottle pockets.3. BIGGER CAPACITY - The exterior size is 12.2"(W) x 17.7"(H) x 4.7"(D),perfect for most 17 - 17.3Inch Laptop.4. GENDER FRIENDLY - Estarer's smart laptop backpack responds perfectly to the demands of the daily commuter, college school students, business professionals, frequent overnight and weekend travelers.5. With its sleek design and compact size, this product is perfect for on-the-go use. Its powerful performance ensures smooth and efficient operation, while its intuitive interface allows for easy navigation and control.6. Whether you're a professional or a casual user, this product caters to all your needs. Its versatile functionality allows for seamless multi tasking, while its extensive storage capacity provides space for all your files and media.</li></ul>